Finding the Fourth Proportional to 72,288.45, 99,760.14 and 40,458.42

Step by Step Solution

1. Step 1: Write the proportion equation
   72,288.45 : 99,760.14 = 40,458.42 : x
2. Step 2: Convert to fraction form
   72,288.45/99,760.14 = 40,458.42/x
3. Step 3: Cross multiply
   72,288.45x = 99,760.14 × 40,458.42
4. Step 4: Simplify right side
   72,288.45x = 4,036,137,643.38
5. Step 5: Solve for x
   x = 4,036,137,643.38/72,288.45
6. Step 6: Final answer
   x = 55,833.78