Finding the Fourth Proportional to 71,449.32, 98,605 and 39,621.18

Step by Step Solution

1. Step 1: Write the proportion equation
   71,449.32 : 98,605 = 39,621.18 : x
2. Step 2: Convert to fraction form
   71,449.32/98,605 = 39,621.18/x
3. Step 3: Cross multiply
   71,449.32x = 98,605 × 39,621.18
4. Step 4: Simplify right side
   71,449.32x = 3,906,846,453.90
5. Step 5: Solve for x
   x = 3,906,846,453.90/71,449.32
6. Step 6: Final answer
   x = 54,679.97