Finding the Fourth Proportional to 102,388.96, 141,304.98 and 57,081.61

Step by Step Solution

1. Step 1: Write the proportion equation
   102,388.96 : 141,304.98 = 57,081.61 : x
2. Step 2: Convert to fraction form
   102,388.96/141,304.98 = 57,081.61/x
3. Step 3: Cross multiply
   102,388.96x = 141,304.98 × 57,081.61
4. Step 4: Simplify right side
   102,388.96x = 8,065,915,759.42
5. Step 5: Solve for x
   x = 8,065,915,759.42/102,388.96
6. Step 6: Final answer
   x = 78,777.20