Finding the Fourth Proportional to 8,243.92, 12,360.40 and 5,781.72

Step by Step Solution

1. Step 1: Write the proportion equation
   8,243.92 : 12,360.40 = 5,781.72 : x
2. Step 2: Convert to fraction form
   8,243.92/12,360.40 = 5,781.72/x
3. Step 3: Cross multiply
   8,243.92x = 12,360.40 × 5,781.72
4. Step 4: Simplify right side
   8,243.92x = 71,464,371.89
5. Step 5: Solve for x
   x = 71,464,371.89/8,243.92
6. Step 6: Final answer
   x = 8,668.74