Finding the Fourth Proportional to 12,288.62, 16,951.83 and 8,311.07

Step by Step Solution

1. Step 1: Write the proportion equation
   12,288.62 : 16,951.83 = 8,311.07 : x
2. Step 2: Convert to fraction form
   12,288.62/16,951.83 = 8,311.07/x
3. Step 3: Cross multiply
   12,288.62x = 16,951.83 × 8,311.07
4. Step 4: Simplify right side
   12,288.62x = 140,887,845.76
5. Step 5: Solve for x
   x = 140,887,845.76/12,288.62
6. Step 6: Final answer
   x = 11,464.90