Finding the Fourth Proportional to 102,061.24, 140,913.24 and 91,272.64

Step by Step Solution

1. Step 1: Write the proportion equation
   102,061.24 : 140,913.24 = 91,272.64 : x
2. Step 2: Convert to fraction form
   102,061.24/140,913.24 = 91,272.64/x
3. Step 3: Cross multiply
   102,061.24x = 140,913.24 × 91,272.64
4. Step 4: Simplify right side
   102,061.24x = 12,861,523,425.75
5. Step 5: Solve for x
   x = 12,861,523,425.75/102,061.24
6. Step 6: Final answer
   x = 126,017.71