Finding the Fourth Proportional to 71,310.42, 98,411.60 and 39,479.31

Step by Step Solution

1. Step 1: Write the proportion equation
   71,310.42 : 98,411.60 = 39,479.31 : x
2. Step 2: Convert to fraction form
   71,310.42/98,411.60 = 39,479.31/x
3. Step 3: Cross multiply
   71,310.42x = 98,411.60 × 39,479.31
4. Step 4: Simplify right side
   71,310.42x = 3,885,222,162.69
5. Step 5: Solve for x
   x = 3,885,222,162.69/71,310.42
6. Step 6: Final answer
   x = 54,483.23