Finding the Fourth Proportional to 12,150, 16,771.32 and 8,426.16

Step by Step Solution

1. Step 1: Write the proportion equation
   12,150 : 16,771.32 = 8,426.16 : x
2. Step 2: Convert to fraction form
   12,150/16,771.32 = 8,426.16/x
3. Step 3: Cross multiply
   12,150x = 16,771.32 × 8,426.16
4. Step 4: Simplify right side
   12,150x = 141,317,825.73
5. Step 5: Solve for x
   x = 141,317,825.73/12,150
6. Step 6: Final answer
   x = 11,631.10