<Qua-2024-736>, hint

Let P,Q,R,S,T be the midpoints of AB, BC, CD, D,A, AC of quadrilateral ABCD .

Then PT//BC, TR//AD.  Let U be the intersection of AQ with PT  and V be the intrsection of

TR with SC.  Then[ APU=[ATU]]=1/8 [ABC], [PUQB]=[TCQU]=3/8 [ABC]

[TCV]=[VCR=1/8[ACD], [ATVS]=[VRDC]=3/8  [ACD]

Consider D approaches towards A infinitely.