Finding the Fourth Proportional to 12,007.92, 18,018.22 and 8,520.46

Step by Step Solution

1. Step 1: Write the proportion equation
   12,007.92 : 18,018.22 = 8,520.46 : x
2. Step 2: Convert to fraction form
   12,007.92/18,018.22 = 8,520.46/x
3. Step 3: Cross multiply
   12,007.92x = 18,018.22 × 8,520.46
4. Step 4: Simplify right side
   12,007.92x = 153,523,522.78
5. Step 5: Solve for x
   x = 153,523,522.78/12,007.92
6. Step 6: Final answer
   x = 12,785.19