Finding the Fourth Proportional to 102,464.80, 141,401.14 and 57,142.83

Step by Step Solution

1. Step 1: Write the proportion equation
   102,464.80 : 141,401.14 = 57,142.83 : x
2. Step 2: Convert to fraction form
   102,464.80/141,401.14 = 57,142.83/x
3. Step 3: Cross multiply
   102,464.80x = 141,401.14 × 57,142.83
4. Step 4: Simplify right side
   102,464.80x = 8,080,061,304.83
5. Step 5: Solve for x
   x = 8,080,061,304.83/102,464.80
6. Step 6: Final answer
   x = 78,856.95