Final answer:
A serum albumin level of 3.6 g/dL indicates therapeutic treatment in a client receiving total parenteral nutrition.
Step-by-step explanation:
The finding that indicates therapeutic treatment in a client receiving total parenteral nutrition is a serum albumin level of 3.6 g/dL. Serum albumin is a protein that is synthesized in the liver and is important for maintaining osmotic balance in the blood. A level of 3.6 g/dL is within the normal range (3.5-5.5 g/dL) and indicates that the client has adequate protein intake and is receiving appropriate nutrition.