Finding the Fourth Proportional to 113,339.76, 156,399.12 and 65,596.20

Step by Step Solution

1. Step 1: Write the proportion equation
   113,339.76 : 156,399.12 = 65,596.20 : x
2. Step 2: Convert to fraction form
   113,339.76/156,399.12 = 65,596.20/x
3. Step 3: Cross multiply
   113,339.76x = 156,399.12 × 65,596.20
4. Step 4: Simplify right side
   113,339.76x = 10,259,187,955.34
5. Step 5: Solve for x
   x = 10,259,187,955.34/113,339.76
6. Step 6: Final answer
   x = 90,517.11