Finding the Fourth Proportional to 72,134.30, 99,550.48 and 39,868.22

Step by Step Solution

1. Step 1: Write the proportion equation
   72,134.30 : 99,550.48 = 39,868.22 : x
2. Step 2: Convert to fraction form
   72,134.30/99,550.48 = 39,868.22/x
3. Step 3: Cross multiply
   72,134.30x = 99,550.48 × 39,868.22
4. Step 4: Simplify right side
   72,134.30x = 3,968,900,586.95
5. Step 5: Solve for x
   x = 3,968,900,586.95/72,134.30
6. Step 6: Final answer
   x = 55,020.99