Finding the Fourth Proportional to 71,943.18, 99,274.35 and 40,109.10

Step by Step Solution

1. Step 1: Write the proportion equation
   71,943.18 : 99,274.35 = 40,109.10 : x
2. Step 2: Convert to fraction form
   71,943.18/99,274.35 = 40,109.10/x
3. Step 3: Cross multiply
   71,943.18x = 99,274.35 × 40,109.10
4. Step 4: Simplify right side
   71,943.18x = 3,981,804,831.59
5. Step 5: Solve for x
   x = 3,981,804,831.59/71,943.18
6. Step 6: Final answer
   x = 55,346.52