Finding the Fourth Proportional to 8,429.50, 12,640.21 and 3,983.46

Step by Step Solution

1. Step 1: Write the proportion equation
   8,429.50 : 12,640.21 = 3,983.46 : x
2. Step 2: Convert to fraction form
   8,429.50/12,640.21 = 3,983.46/x
3. Step 3: Cross multiply
   8,429.50x = 12,640.21 × 3,983.46
4. Step 4: Simplify right side
   8,429.50x = 50,351,784.67
5. Step 5: Solve for x
   x = 50,351,784.67/8,429.50
6. Step 6: Final answer
   x = 5,973.28