Finding the Fourth Proportional to 71,696.90, 98,942.98 and 39,435

Step by Step Solution

1. Step 1: Write the proportion equation
   71,696.90 : 98,942.98 = 39,435 : x
2. Step 2: Convert to fraction form
   71,696.90/98,942.98 = 39,435/x
3. Step 3: Cross multiply
   71,696.90x = 98,942.98 × 39,435
4. Step 4: Simplify right side
   71,696.90x = 3,901,816,416.30
5. Step 5: Solve for x
   x = 3,901,816,416.30/71,696.90
6. Step 6: Final answer
   x = 54,420.99