Finding the Fourth Proportional to 6,379.52, 8,802.72 and 3,861.20

Step by Step Solution

1. Step 1: Write the proportion equation
   6,379.52 : 8,802.72 = 3,861.20 : x
2. Step 2: Convert to fraction form
   6,379.52/8,802.72 = 3,861.20/x
3. Step 3: Cross multiply
   6,379.52x = 8,802.72 × 3,861.20
4. Step 4: Simplify right side
   6,379.52x = 33,989,062.46
5. Step 5: Solve for x
   x = 33,989,062.46/6,379.52
6. Step 6: Final answer
   x = 5,327.84