Finding the Fourth Proportional to 21,758.28, 30,024.72 and 12,324.48

Step by Step Solution

1. Step 1: Write the proportion equation
   21,758.28 : 30,024.72 = 12,324.48 : x
2. Step 2: Convert to fraction form
   21,758.28/30,024.72 = 12,324.48/x
3. Step 3: Cross multiply
   21,758.28x = 30,024.72 × 12,324.48
4. Step 4: Simplify right side
   21,758.28x = 370,039,061.15
5. Step 5: Solve for x
   x = 370,039,061.15/21,758.28
6. Step 6: Final answer
   x = 17,006.82