Finding the Fourth Proportional to 12,603.68, 17,399.04 and 8,414.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,603.68 : 17,399.04 = 8,414.72 : x
2. Step 2: Convert to fraction form
   12,603.68/17,399.04 = 8,414.72/x
3. Step 3: Cross multiply
   12,603.68x = 17,399.04 × 8,414.72
4. Step 4: Simplify right side
   12,603.68x = 146,408,049.87
5. Step 5: Solve for x
   x = 146,408,049.87/12,603.68
6. Step 6: Final answer
   x = 11,616.29