Finding the Fourth Proportional to 8,443.27, 12,672.69 and 4,286.20

Step by Step Solution

1. Step 1: Write the proportion equation
   8,443.27 : 12,672.69 = 4,286.20 : x
2. Step 2: Convert to fraction form
   8,443.27/12,672.69 = 4,286.20/x
3. Step 3: Cross multiply
   8,443.27x = 12,672.69 × 4,286.20
4. Step 4: Simplify right side
   8,443.27x = 54,317,683.88
5. Step 5: Solve for x
   x = 54,317,683.88/8,443.27
6. Step 6: Final answer
   x = 6,433.25