The past tense of act as if you had money to burn is acted as if you had money to burn.
The third-person singular simple present indicative form of act as if you had money to burn is acts as if you had money to burn.
The present participle of act as if you had money to burn is acting as if you had money to burn.
The past participle of act as if you had money to burn is acted as if you had money to burn.