Finding the Fourth Proportional to 113,129.35, 156,109.40 and 65,385.79

Step by Step Solution

1. Step 1: Write the proportion equation
   113,129.35 : 156,109.40 = 65,385.79 : x
2. Step 2: Convert to fraction form
   113,129.35/156,109.40 = 65,385.79/x
3. Step 3: Cross multiply
   113,129.35x = 156,109.40 × 65,385.79
4. Step 4: Simplify right side
   113,129.35x = 10,207,336,118.50
5. Step 5: Solve for x
   x = 10,207,336,118.50/113,129.35
6. Step 6: Final answer
   x = 90,227.13