Finding the Fourth Proportional to 71,388.50, 98,518.29 and 39,554.42

Step by Step Solution

1. Step 1: Write the proportion equation
   71,388.50 : 98,518.29 = 39,554.42 : x
2. Step 2: Convert to fraction form
   71,388.50/98,518.29 = 39,554.42/x
3. Step 3: Cross multiply
   71,388.50x = 98,518.29 × 39,554.42
4. Step 4: Simplify right side
   71,388.50x = 3,896,833,820.34
5. Step 5: Solve for x
   x = 3,896,833,820.34/71,388.50
6. Step 6: Final answer
   x = 54,586.30