Finding the Fourth Proportional to 9,414.46, 12,997.20 and 8,417.35

Step by Step Solution

1. Step 1: Write the proportion equation
   9,414.46 : 12,997.20 = 8,417.35 : x
2. Step 2: Convert to fraction form
   9,414.46/12,997.20 = 8,417.35/x
3. Step 3: Cross multiply
   9,414.46x = 12,997.20 × 8,417.35
4. Step 4: Simplify right side
   9,414.46x = 109,401,981.42
5. Step 5: Solve for x
   x = 109,401,981.42/9,414.46
6. Step 6: Final answer
   x = 11,620.63