Finding the Fourth Proportional to 71,321.72, 98,423.98 and 39,490.62

Step by Step Solution

1. Step 1: Write the proportion equation
   71,321.72 : 98,423.98 = 39,490.62 : x
2. Step 2: Convert to fraction form
   71,321.72/98,423.98 = 39,490.62/x
3. Step 3: Cross multiply
   71,321.72x = 98,423.98 × 39,490.62
4. Step 4: Simplify right side
   71,321.72x = 3,886,823,894.34
5. Step 5: Solve for x
   x = 3,886,823,894.34/71,321.72
6. Step 6: Final answer
   x = 54,497.06