Finding the Fourth Proportional to 71,871.86, 107,827.24 and 40,728.98

Step by Step Solution

1. Step 1: Write the proportion equation
   71,871.86 : 107,827.24 = 40,728.98 : x
2. Step 2: Convert to fraction form
   71,871.86/107,827.24 = 40,728.98/x
3. Step 3: Cross multiply
   71,871.86x = 107,827.24 × 40,728.98
4. Step 4: Simplify right side
   71,871.86x = 4,391,693,501.42
5. Step 5: Solve for x
   x = 4,391,693,501.42/71,871.86
6. Step 6: Final answer
   x = 61,104.49