The affix vati (vat) comes after a word in the Accusative -2nd case in construction in the sense of 'befitting that or suited to that'.,
As राजानमर्हति = राजवत् पालनम् \the protection as befits a king i.e. as a king should protect\. ब्राह्मणवत्, ऋषिवत्, क्षत्रियवत् ॥,