Index-match return exact match, if not closest match

[ALVG2019]

I have this formula : INDEX(A2:A20,MATCH(1,(F10=C2:C20)*(F11=B2:B20),0)
It returns the exact match. I need the formula to return the closest match if the there's no exact match

this is my data : A2:A20
I need to find the PO that is closest to the date 19-03-17 , the result should be : P91180

P/O	Required	Product			SORT BY PO
P90749	19-03-08	2241773
P90749	19-03-08	2241773
P90750	19-05-01	2241773
P90757	19-03-31	1132113
P90757	19-03-31	1132114		1145879
P91179	19-03-11	1145879		19-03-17
P91180	19-03-15	1145879		#N/A	Closest Match , SHOULD BE P91180
P91181	19-04-02	1145879		INDEX(A2:A20,MATCH(1,1*(E6=C2:C20)*(E7=B2:B20)*(MIN(IF(B2:B20>E7,B2:B20))),0))
P91182	19-05-01	1145879		1145879
P91183	19-06-01	1145879		19-05-01
P91199	19-05-15	1120975		P91182	Exact Match
P91217	19-03-20	1130397		INDEX(A2:A20,MATCH(1,(F10=C2:C20)*(F11=B2:B20),0)
P91261	19-03-08	1120976
P91390	19-03-30	1130397
P91427	19-03-27	1124940
P91491	19-03-01	1140773
P91572	19-03-23	1130882
P91614	19-03-27	8229026
P91615	19-05-01	8229026

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[AhoyNC]

Maybe this array formula that must be entered with CTRL-SHIFT-ENTER.

Excel Workbook
	A	B	C	D	E	F
1	P/O	Required	Product		Date	PO
2	P90749	3/8/2019	2241773		3/17/2019	P91180
3	P90749	3/8/2019	2241773
4	P90750	5/1/2019	2241773
5	P90757	3/31/2019	1132113
6	P90757	3/31/2019	1132114
7	P91179	3/11/2019	1145879
8	P91180	3/15/2019	1145879
9	P91181	4/2/2019	1145879
10	P91182	5/1/2019	1145879
11	P91183	6/1/2019	1145879
12	P91199	5/15/2019	1120975
13	P91217	3/20/2019	1130397
14	P91261	3/8/2019	1120976
15	P91390	3/30/2019	1130397
16	P91427	3/27/2019	1124940
17	P91491	3/1/2019	1140773
18	P91572	3/23/2019	1130882
19	P91614	3/27/2019	8229026
20	P91615	5/1/2019	8229026
Sheet