Finding the Fourth Proportional to 71,613.40, 98,826.60 and 39,781.48

Step by Step Solution

1. Step 1: Write the proportion equation
   71,613.40 : 98,826.60 = 39,781.48 : x
2. Step 2: Convert to fraction form
   71,613.40/98,826.60 = 39,781.48/x
3. Step 3: Cross multiply
   71,613.40x = 98,826.60 × 39,781.48
4. Step 4: Simplify right side
   71,613.40x = 3,931,468,411.37
5. Step 5: Solve for x
   x = 3,931,468,411.37/71,613.40
6. Step 6: Final answer
   x = 54,898.50