Finding the Fourth Proportional to 11,231.72, 15,499.25 and 6,448.29

Step by Step Solution

1. Step 1: Write the proportion equation
   11,231.72 : 15,499.25 = 6,448.29 : x
2. Step 2: Convert to fraction form
   11,231.72/15,499.25 = 6,448.29/x
3. Step 3: Cross multiply
   11,231.72x = 15,499.25 × 6,448.29
4. Step 4: Simplify right side
   11,231.72x = 99,943,710.45
5. Step 5: Solve for x
   x = 99,943,710.45/11,231.72
6. Step 6: Final answer
   x = 8,898.35