Finding the Fourth Proportional to 71,945.37, 99,285.20 and 40,116.42

Step by Step Solution

1. Step 1: Write the proportion equation
   71,945.37 : 99,285.20 = 40,116.42 : x
2. Step 2: Convert to fraction form
   71,945.37/99,285.20 = 40,116.42/x
3. Step 3: Cross multiply
   71,945.37x = 99,285.20 × 40,116.42
4. Step 4: Simplify right side
   71,945.37x = 3,982,966,582.40
5. Step 5: Solve for x
   x = 3,982,966,582.40/71,945.37
6. Step 6: Final answer
   x = 55,360.99