Finding the Fourth Proportional to 113,540.86, 156,686.43 and 65,821.87

Step by Step Solution

1. Step 1: Write the proportion equation
   113,540.86 : 156,686.43 = 65,821.87 : x
2. Step 2: Convert to fraction form
   113,540.86/156,686.43 = 65,821.87/x
3. Step 3: Cross multiply
   113,540.86x = 156,686.43 × 65,821.87
4. Step 4: Simplify right side
   113,540.86x = 10,313,393,826.22
5. Step 5: Solve for x
   x = 10,313,393,826.22/113,540.86
6. Step 6: Final answer
   x = 90,834.21