Finding the Fourth Proportional to 131,868.71, 181,978.07 and 71,440.53

Step by Step Solution

1. Step 1: Write the proportion equation
   131,868.71 : 181,978.07 = 71,440.53 : x
2. Step 2: Convert to fraction form
   131,868.71/181,978.07 = 71,440.53/x
3. Step 3: Cross multiply
   131,868.71x = 181,978.07 × 71,440.53
4. Step 4: Simplify right side
   131,868.71x = 13,000,609,411.97
5. Step 5: Solve for x
   x = 13,000,609,411.97/131,868.71
6. Step 6: Final answer
   x = 98,587.53