Finding the Fourth Proportional to 102,399.73, 141,294.51 and 57,067.78

Step by Step Solution

1. Step 1: Write the proportion equation
   102,399.73 : 141,294.51 = 57,067.78 : x
2. Step 2: Convert to fraction form
   102,399.73/141,294.51 = 57,067.78/x
3. Step 3: Cross multiply
   102,399.73x = 141,294.51 × 57,067.78
4. Step 4: Simplify right side
   102,399.73x = 8,063,364,011.89
5. Step 5: Solve for x
   x = 8,063,364,011.89/102,399.73
6. Step 6: Final answer
   x = 78,744.00