Finding the Fourth Proportional to 22,218.16, 30,662.24 and 12,789.76

Step by Step Solution

1. Step 1: Write the proportion equation
   22,218.16 : 30,662.24 = 12,789.76 : x
2. Step 2: Convert to fraction form
   22,218.16/30,662.24 = 12,789.76/x
3. Step 3: Cross multiply
   22,218.16x = 30,662.24 × 12,789.76
4. Step 4: Simplify right side
   22,218.16x = 392,162,690.66
5. Step 5: Solve for x
   x = 392,162,690.66/22,218.16
6. Step 6: Final answer
   x = 17,650.55