Finding the Fourth Proportional to 113,439.24, 156,580.56 and 65,704.32

Step by Step Solution

1. Step 1: Write the proportion equation
   113,439.24 : 156,580.56 = 65,704.32 : x
2. Step 2: Convert to fraction form
   113,439.24/156,580.56 = 65,704.32/x
3. Step 3: Cross multiply
   113,439.24x = 156,580.56 × 65,704.32
4. Step 4: Simplify right side
   113,439.24x = 10,288,019,220.02
5. Step 5: Solve for x
   x = 10,288,019,220.02/113,439.24
6. Step 6: Final answer
   x = 90,691.89