Finding the Fourth Proportional to 6,380.50, 8,801.42 and 3,986.32

Step by Step Solution

1. Step 1: Write the proportion equation
   6,380.50 : 8,801.42 = 3,986.32 : x
2. Step 2: Convert to fraction form
   6,380.50/8,801.42 = 3,986.32/x
3. Step 3: Cross multiply
   6,380.50x = 8,801.42 × 3,986.32
4. Step 4: Simplify right side
   6,380.50x = 35,085,276.57
5. Step 5: Solve for x
   x = 35,085,276.57/6,380.50
6. Step 6: Final answer
   x = 5,498.83