Finding the Fourth Proportional to 71,999.91, 99,359.94 and 40,168.82

Step by Step Solution

1. Step 1: Write the proportion equation
   71,999.91 : 99,359.94 = 40,168.82 : x
2. Step 2: Convert to fraction form
   71,999.91/99,359.94 = 40,168.82/x
3. Step 3: Cross multiply
   71,999.91x = 99,359.94 × 40,168.82
4. Step 4: Simplify right side
   71,999.91x = 3,991,171,944.10
5. Step 5: Solve for x
   x = 3,991,171,944.10/71,999.91
6. Step 6: Final answer
   x = 55,433.01