Finding the Fourth Proportional to 113,129.13, 156,109.10 and 65,385.57

Step by Step Solution

1. Step 1: Write the proportion equation
   113,129.13 : 156,109.10 = 65,385.57 : x
2. Step 2: Convert to fraction form
   113,129.13/156,109.10 = 65,385.57/x
3. Step 3: Cross multiply
   113,129.13x = 156,109.10 × 65,385.57
4. Step 4: Simplify right side
   113,129.13x = 10,207,282,158.76
5. Step 5: Solve for x
   x = 10,207,282,158.76/113,129.13
6. Step 6: Final answer
   x = 90,226.82