Finding the Fourth Proportional to 102,400.73, 141,295.89 and 57,068.78

Step by Step Solution

1. Step 1: Write the proportion equation
   102,400.73 : 141,295.89 = 57,068.78 : x
2. Step 2: Convert to fraction form
   102,400.73/141,295.89 = 57,068.78/x
3. Step 3: Cross multiply
   102,400.73x = 141,295.89 × 57,068.78
4. Step 4: Simplify right side
   102,400.73x = 8,063,584,061.31
5. Step 5: Solve for x
   x = 8,063,584,061.31/102,400.73
6. Step 6: Final answer
   x = 78,745.38