Donation Report for Parent Campaign with all Child Campaigns
BLANKVALUE(Parent.Parent.Parent.Parent.Parent.Name,
BLANKVALUE(Parent.Parent.Parent.Parent.Name,
BLANKVALUE(Parent.Parent.Parent.Name,
BLANKVALUE(Parent.Parent.Name,
BLANKVALUE(Parent.Name,
Name)))))
逆のパターン
I don't think it can be done with formulas, since Contact_Additional_Info and Contact_Additional_Info are only related via parent objects.
Children refer to parents and parents refer to children, but parents cannot refer to children in formulas.
Automated processing is required.