Finding the Fourth Proportional to 113,656.96, 156,855.15 and 65,909.89

Step by Step Solution

1. Step 1: Write the proportion equation
   113,656.96 : 156,855.15 = 65,909.89 : x
2. Step 2: Convert to fraction form
   113,656.96/156,855.15 = 65,909.89/x
3. Step 3: Cross multiply
   113,656.96x = 156,855.15 × 65,909.89
4. Step 4: Simplify right side
   113,656.96x = 10,338,305,682.43
5. Step 5: Solve for x
   x = 10,338,305,682.43/113,656.96
6. Step 6: Final answer
   x = 90,960.60