Finding the Fourth Proportional to 8,433.50, 12,647.50 and 3,990.46

Step by Step Solution

1. Step 1: Write the proportion equation
   8,433.50 : 12,647.50 = 3,990.46 : x
2. Step 2: Convert to fraction form
   8,433.50/12,647.50 = 3,990.46/x
3. Step 3: Cross multiply
   8,433.50x = 12,647.50 × 3,990.46
4. Step 4: Simplify right side
   8,433.50x = 50,469,342.85
5. Step 5: Solve for x
   x = 50,469,342.85/8,433.50
6. Step 6: Final answer
   x = 5,984.39