Finding the Fourth Proportional to 71,408.56, 98,540.25 and 39,577.18

Step by Step Solution

1. Step 1: Write the proportion equation
   71,408.56 : 98,540.25 = 39,577.18 : x
2. Step 2: Convert to fraction form
   71,408.56/98,540.25 = 39,577.18/x
3. Step 3: Cross multiply
   71,408.56x = 98,540.25 × 39,577.18
4. Step 4: Simplify right side
   71,408.56x = 3,899,945,211.50
5. Step 5: Solve for x
   x = 3,899,945,211.50/71,408.56
6. Step 6: Final answer
   x = 54,614.53