Finding the Fourth Proportional to 83,520.72, 125,311.86 and 39,161.88

Step by Step Solution

1. Step 1: Write the proportion equation
   83,520.72 : 125,311.86 = 39,161.88 : x
2. Step 2: Convert to fraction form
   83,520.72/125,311.86 = 39,161.88/x
3. Step 3: Cross multiply
   83,520.72x = 125,311.86 × 39,161.88
4. Step 4: Simplify right side
   83,520.72x = 4,907,448,023.90
5. Step 5: Solve for x
   x = 4,907,448,023.90/83,520.72
6. Step 6: Final answer
   x = 58,757.25