Finding the Fourth Proportional to 8,383.20, 12,568.82 and 3,938.40

Step by Step Solution

1. Step 1: Write the proportion equation
   8,383.20 : 12,568.82 = 3,938.40 : x
2. Step 2: Convert to fraction form
   8,383.20/12,568.82 = 3,938.40/x
3. Step 3: Cross multiply
   8,383.20x = 12,568.82 × 3,938.40
4. Step 4: Simplify right side
   8,383.20x = 49,501,040.69
5. Step 5: Solve for x
   x = 49,501,040.69/8,383.20
6. Step 6: Final answer
   x = 5,904.79