Finding the Fourth Proportional to 6,372.57, 8,798.39 and 3,986.15

Step by Step Solution

1. Step 1: Write the proportion equation
   6,372.57 : 8,798.39 = 3,986.15 : x
2. Step 2: Convert to fraction form
   6,372.57/8,798.39 = 3,986.15/x
3. Step 3: Cross multiply
   6,372.57x = 8,798.39 × 3,986.15
4. Step 4: Simplify right side
   6,372.57x = 35,071,653.32
5. Step 5: Solve for x
   x = 35,071,653.32/6,372.57
6. Step 6: Final answer
   x = 5,503.53