Finding the Fourth Proportional to 71,665.34, 98,899.35 and 39,401.32

Step by Step Solution

1. Step 1: Write the proportion equation
   71,665.34 : 98,899.35 = 39,401.32 : x
2. Step 2: Convert to fraction form
   71,665.34/98,899.35 = 39,401.32/x
3. Step 3: Cross multiply
   71,665.34x = 98,899.35 × 39,401.32
4. Step 4: Simplify right side
   71,665.34x = 3,896,764,937.14
5. Step 5: Solve for x
   x = 3,896,764,937.14/71,665.34
6. Step 6: Final answer
   x = 54,374.47