Finding the Fourth Proportional to 113,425.28, 156,517.61 and 65,681.72

Step by Step Solution

1. Step 1: Write the proportion equation
   113,425.28 : 156,517.61 = 65,681.72 : x
2. Step 2: Convert to fraction form
   113,425.28/156,517.61 = 65,681.72/x
3. Step 3: Cross multiply
   113,425.28x = 156,517.61 × 65,681.72
4. Step 4: Simplify right side
   113,425.28x = 10,280,344,724.09
5. Step 5: Solve for x
   x = 10,280,344,724.09/113,425.28
6. Step 6: Final answer
   x = 90,635.40