Finding the Fourth Proportional to 12,216.62, 16,867.50 and 10,789.40

Step by Step Solution

1. Step 1: Write the proportion equation
   12,216.62 : 16,867.50 = 10,789.40 : x
2. Step 2: Convert to fraction form
   12,216.62/16,867.50 = 10,789.40/x
3. Step 3: Cross multiply
   12,216.62x = 16,867.50 × 10,789.40
4. Step 4: Simplify right side
   12,216.62x = 181,990,204.50
5. Step 5: Solve for x
   x = 181,990,204.50/12,216.62
6. Step 6: Final answer
   x = 14,896.94