Finding the Fourth Proportional to 113,155.72, 156,137.55 and 65,399.86

Step by Step Solution

1. Step 1: Write the proportion equation
   113,155.72 : 156,137.55 = 65,399.86 : x
2. Step 2: Convert to fraction form
   113,155.72/156,137.55 = 65,399.86/x
3. Step 3: Cross multiply
   113,155.72x = 156,137.55 × 65,399.86
4. Step 4: Simplify right side
   113,155.72x = 10,211,373,910.74
5. Step 5: Solve for x
   x = 10,211,373,910.74/113,155.72
6. Step 6: Final answer
   x = 90,241.78