Finding the Fourth Proportional to 102,391.76, 141,300.80 and 57,068.72

Step by Step Solution

1. Step 1: Write the proportion equation
   102,391.76 : 141,300.80 = 57,068.72 : x
2. Step 2: Convert to fraction form
   102,391.76/141,300.80 = 57,068.72/x
3. Step 3: Cross multiply
   102,391.76x = 141,300.80 × 57,068.72
4. Step 4: Simplify right side
   102,391.76x = 8,063,855,790.98
5. Step 5: Solve for x
   x = 8,063,855,790.98/102,391.76
6. Step 6: Final answer
   x = 78,754.93