Finding the Fourth Proportional to 51,411.24, 71,039.88 and 40,109.04

Step by Step Solution

1. Step 1: Write the proportion equation
   51,411.24 : 71,039.88 = 40,109.04 : x
2. Step 2: Convert to fraction form
   51,411.24/71,039.88 = 40,109.04/x
3. Step 3: Cross multiply
   51,411.24x = 71,039.88 × 40,109.04
4. Step 4: Simplify right side
   51,411.24x = 2,849,341,388.52
5. Step 5: Solve for x
   x = 2,849,341,388.52/51,411.24
6. Step 6: Final answer
   x = 55,422.54