Finding the Fourth Proportional to 12,224.72, 18,329.49 and 5,642.46

Step by Step Solution

1. Step 1: Write the proportion equation
   12,224.72 : 18,329.49 = 5,642.46 : x
2. Step 2: Convert to fraction form
   12,224.72/18,329.49 = 5,642.46/x
3. Step 3: Cross multiply
   12,224.72x = 18,329.49 × 5,642.46
4. Step 4: Simplify right side
   12,224.72x = 103,423,414.15
5. Step 5: Solve for x
   x = 103,423,414.15/12,224.72
6. Step 6: Final answer
   x = 8,460.19