Finding the Fourth Proportional to 21,760.29, 30,027.42 and 12,198.78

Step by Step Solution

1. Step 1: Write the proportion equation
   21,760.29 : 30,027.42 = 12,198.78 : x
2. Step 2: Convert to fraction form
   21,760.29/30,027.42 = 12,198.78/x
3. Step 3: Cross multiply
   21,760.29x = 30,027.42 × 12,198.78
4. Step 4: Simplify right side
   21,760.29x = 366,297,890.55
5. Step 5: Solve for x
   x = 366,297,890.55/21,760.29
6. Step 6: Final answer
   x = 16,833.32