Finding the Fourth Proportional to 71,906.89, 99,234.90 and 40,076.02

Step by Step Solution

1. Step 1: Write the proportion equation
   71,906.89 : 99,234.90 = 40,076.02 : x
2. Step 2: Convert to fraction form
   71,906.89/99,234.90 = 40,076.02/x
3. Step 3: Cross multiply
   71,906.89x = 99,234.90 × 40,076.02
4. Step 4: Simplify right side
   71,906.89x = 3,976,939,290.23
5. Step 5: Solve for x
   x = 3,976,939,290.23/71,906.89
6. Step 6: Final answer
   x = 55,306.79