Finding the Fourth Proportional to 6,223.20, 8,587.76 and 3,981.92

Step by Step Solution

1. Step 1: Write the proportion equation
   6,223.20 : 8,587.76 = 3,981.92 : x
2. Step 2: Convert to fraction form
   6,223.20/8,587.76 = 3,981.92/x
3. Step 3: Cross multiply
   6,223.20x = 8,587.76 × 3,981.92
4. Step 4: Simplify right side
   6,223.20x = 34,195,773.30
5. Step 5: Solve for x
   x = 34,195,773.30/6,223.20
6. Step 6: Final answer
   x = 5,494.89