Finding the Fourth Proportional to 71,492.98, 98,672.12 and 39,672.13

Step by Step Solution

1. Step 1: Write the proportion equation
   71,492.98 : 98,672.12 = 39,672.13 : x
2. Step 2: Convert to fraction form
   71,492.98/98,672.12 = 39,672.13/x
3. Step 3: Cross multiply
   71,492.98x = 98,672.12 × 39,672.13
4. Step 4: Simplify right side
   71,492.98x = 3,914,533,172.02
5. Step 5: Solve for x
   x = 3,914,533,172.02/71,492.98
6. Step 6: Final answer
   x = 54,754.09