Finding the Fourth Proportional to 113,520.72, 156,685.68 and 65,800.38

Step by Step Solution

1. Step 1: Write the proportion equation
   113,520.72 : 156,685.68 = 65,800.38 : x
2. Step 2: Convert to fraction form
   113,520.72/156,685.68 = 65,800.38/x
3. Step 3: Cross multiply
   113,520.72x = 156,685.68 × 65,800.38
4. Step 4: Simplify right side
   113,520.72x = 10,309,977,284.56
5. Step 5: Solve for x
   x = 10,309,977,284.56/113,520.72
6. Step 6: Final answer
   x = 90,820.22