Finding the Fourth Proportional to 71,758.72, 99,018.12 and 39,925.36

Step by Step Solution

1. Step 1: Write the proportion equation
   71,758.72 : 99,018.12 = 39,925.36 : x
2. Step 2: Convert to fraction form
   71,758.72/99,018.12 = 39,925.36/x
3. Step 3: Cross multiply
   71,758.72x = 99,018.12 × 39,925.36
4. Step 4: Simplify right side
   71,758.72x = 3,953,334,087.52
5. Step 5: Solve for x
   x = 3,953,334,087.52/71,758.72
6. Step 6: Final answer
   x = 55,092.04