Finding the Fourth Proportional to 71,422.79, 98,566.85 and 39,591.72

Step by Step Solution

1. Step 1: Write the proportion equation
   71,422.79 : 98,566.85 = 39,591.72 : x
2. Step 2: Convert to fraction form
   71,422.79/98,566.85 = 39,591.72/x
3. Step 3: Cross multiply
   71,422.79x = 98,566.85 × 39,591.72
4. Step 4: Simplify right side
   71,422.79x = 3,902,431,225.46
5. Step 5: Solve for x
   x = 3,902,431,225.46/71,422.79
6. Step 6: Final answer
   x = 54,638.46