Finding the Fourth Proportional to 116,729.10, 161,056.89 and 65,731.50

Step by Step Solution

1. Step 1: Write the proportion equation
   116,729.10 : 161,056.89 = 65,731.50 : x
2. Step 2: Convert to fraction form
   116,729.10/161,056.89 = 65,731.50/x
3. Step 3: Cross multiply
   116,729.10x = 161,056.89 × 65,731.50
4. Step 4: Simplify right side
   116,729.10x = 10,586,510,965.04
5. Step 5: Solve for x
   x = 10,586,510,965.04/116,729.10
6. Step 6: Final answer
   x = 90,692.99