Finding the Fourth Proportional to 65,129.52, 89,854.83 and 39,625.50

Step by Step Solution

1. Step 1: Write the proportion equation
   65,129.52 : 89,854.83 = 39,625.50 : x
2. Step 2: Convert to fraction form
   65,129.52/89,854.83 = 39,625.50/x
3. Step 3: Cross multiply
   65,129.52x = 89,854.83 × 39,625.50
4. Step 4: Simplify right side
   65,129.52x = 3,560,542,566.17
5. Step 5: Solve for x
   x = 3,560,542,566.17/65,129.52
6. Step 6: Final answer
   x = 54,668.64