Finding the Fourth Proportional to 99,488.24, 137,359.92 and 76,477.28

Step by Step Solution

1. Step 1: Write the proportion equation
   99,488.24 : 137,359.92 = 76,477.28 : x
2. Step 2: Convert to fraction form
   99,488.24/137,359.92 = 76,477.28/x
3. Step 3: Cross multiply
   99,488.24x = 137,359.92 × 76,477.28
4. Step 4: Simplify right side
   99,488.24x = 10,504,913,062.62
5. Step 5: Solve for x
   x = 10,504,913,062.62/99,488.24
6. Step 6: Final answer
   x = 105,589.50