Finding the Fourth Proportional to 22,231.42, 30,682.02 and 12,799.78

Step by Step Solution

1. Step 1: Write the proportion equation
   22,231.42 : 30,682.02 = 12,799.78 : x
2. Step 2: Convert to fraction form
   22,231.42/30,682.02 = 12,799.78/x
3. Step 3: Cross multiply
   22,231.42x = 30,682.02 × 12,799.78
4. Step 4: Simplify right side
   22,231.42x = 392,723,105.96
5. Step 5: Solve for x
   x = 392,723,105.96/22,231.42
6. Step 6: Final answer
   x = 17,665.23