Finding the Fourth Proportional to 12,217.08, 18,323.50 and 5,642.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,217.08 : 18,323.50 = 5,642.72 : x
2. Step 2: Convert to fraction form
   12,217.08/18,323.50 = 5,642.72/x
3. Step 3: Cross multiply
   12,217.08x = 18,323.50 × 5,642.72
4. Step 4: Simplify right side
   12,217.08x = 103,394,379.92
5. Step 5: Solve for x
   x = 103,394,379.92/12,217.08
6. Step 6: Final answer
   x = 8,463.10