Finding the Fourth Proportional to 21,756.15, 30,024.09 and 12,324.69

Step by Step Solution

1. Step 1: Write the proportion equation
   21,756.15 : 30,024.09 = 12,324.69 : x
2. Step 2: Convert to fraction form
   21,756.15/30,024.09 = 12,324.69/x
3. Step 3: Cross multiply
   21,756.15x = 30,024.09 × 12,324.69
4. Step 4: Simplify right side
   21,756.15x = 370,037,601.78
5. Step 5: Solve for x
   x = 370,037,601.78/21,756.15
6. Step 6: Final answer
   x = 17,008.41