Finding the Fourth Proportional to 71,492.90, 98,672.02 and 39,672.05

Step by Step Solution

1. Step 1: Write the proportion equation
   71,492.90 : 98,672.02 = 39,672.05 : x
2. Step 2: Convert to fraction form
   71,492.90/98,672.02 = 39,672.05/x
3. Step 3: Cross multiply
   71,492.90x = 98,672.02 × 39,672.05
4. Step 4: Simplify right side
   71,492.90x = 3,914,520,718.50
5. Step 5: Solve for x
   x = 3,914,520,718.50/71,492.90
6. Step 6: Final answer
   x = 54,753.98