Finding the Fourth Proportional to 12,443.24, 18,658.77 and 5,429.18

Step by Step Solution

1. Step 1: Write the proportion equation
   12,443.24 : 18,658.77 = 5,429.18 : x
2. Step 2: Convert to fraction form
   12,443.24/18,658.77 = 5,429.18/x
3. Step 3: Cross multiply
   12,443.24x = 18,658.77 × 5,429.18
4. Step 4: Simplify right side
   12,443.24x = 101,301,727.61
5. Step 5: Solve for x
   x = 101,301,727.61/12,443.24
6. Step 6: Final answer
   x = 8,141.11