Finding the Fourth Proportional to 6,371.30, 8,791.68 and 3,983.20

Step by Step Solution

1. Step 1: Write the proportion equation
   6,371.30 : 8,791.68 = 3,983.20 : x
2. Step 2: Convert to fraction form
   6,371.30/8,791.68 = 3,983.20/x
3. Step 3: Cross multiply
   6,371.30x = 8,791.68 × 3,983.20
4. Step 4: Simplify right side
   6,371.30x = 35,019,019.78
5. Step 5: Solve for x
   x = 35,019,019.78/6,371.30
6. Step 6: Final answer
   x = 5,496.37