Finding the Fourth Proportional to 12,443.26, 18,665.28 and 5,517.76

Step by Step Solution

1. Step 1: Write the proportion equation
   12,443.26 : 18,665.28 = 5,517.76 : x
2. Step 2: Convert to fraction form
   12,443.26/18,665.28 = 5,517.76/x
3. Step 3: Cross multiply
   12,443.26x = 18,665.28 × 5,517.76
4. Step 4: Simplify right side
   12,443.26x = 102,990,535.37
5. Step 5: Solve for x
   x = 102,990,535.37/12,443.26
6. Step 6: Final answer
   x = 8,276.81