Finding the Fourth Proportional to 71,388.05, 98,516.19 and 39,557.63

Step by Step Solution

1. Step 1: Write the proportion equation
   71,388.05 : 98,516.19 = 39,557.63 : x
2. Step 2: Convert to fraction form
   71,388.05/98,516.19 = 39,557.63/x
3. Step 3: Cross multiply
   71,388.05x = 98,516.19 × 39,557.63
4. Step 4: Simplify right side
   71,388.05x = 3,897,066,500.45
5. Step 5: Solve for x
   x = 3,897,066,500.45/71,388.05
6. Step 6: Final answer
   x = 54,589.90