Finding the Fourth Proportional to 12,488.88, 17,229.24 and 7,518

Step by Step Solution

1. Step 1: Write the proportion equation
   12,488.88 : 17,229.24 = 7,518 : x
2. Step 2: Convert to fraction form
   12,488.88/17,229.24 = 7,518/x
3. Step 3: Cross multiply
   12,488.88x = 17,229.24 × 7,518
4. Step 4: Simplify right side
   12,488.88x = 129,529,426.32
5. Step 5: Solve for x
   x = 129,529,426.32/12,488.88
6. Step 6: Final answer
   x = 10,371.58