Finding the Fourth Proportional to 71,496.72, 98,664.90 and 39,665.58

Step by Step Solution

1. Step 1: Write the proportion equation
   71,496.72 : 98,664.90 = 39,665.58 : x
2. Step 2: Convert to fraction form
   71,496.72/98,664.90 = 39,665.58/x
3. Step 3: Cross multiply
   71,496.72x = 98,664.90 × 39,665.58
4. Step 4: Simplify right side
   71,496.72x = 3,913,600,484.14
5. Step 5: Solve for x
   x = 3,913,600,484.14/71,496.72
6. Step 6: Final answer
   x = 54,738.18