Finding the Fourth Proportional to 102,434.86, 141,360.83 and 57,115.81

Step by Step Solution

1. Step 1: Write the proportion equation
   102,434.86 : 141,360.83 = 57,115.81 : x
2. Step 2: Convert to fraction form
   102,434.86/141,360.83 = 57,115.81/x
3. Step 3: Cross multiply
   102,434.86x = 141,360.83 × 57,115.81
4. Step 4: Simplify right side
   102,434.86x = 8,073,938,307.72
5. Step 5: Solve for x
   x = 8,073,938,307.72/102,434.86
6. Step 6: Final answer
   x = 78,820.22