Finding the Fourth Proportional to 102,834.69, 141,910.85 and 57,512.15

Step by Step Solution

1. Step 1: Write the proportion equation
   102,834.69 : 141,910.85 = 57,512.15 : x
2. Step 2: Convert to fraction form
   102,834.69/141,910.85 = 57,512.15/x
3. Step 3: Cross multiply
   102,834.69x = 141,910.85 × 57,512.15
4. Step 4: Simplify right side
   102,834.69x = 8,161,598,091.83
5. Step 5: Solve for x
   x = 8,161,598,091.83/102,834.69
6. Step 6: Final answer
   x = 79,366.20