Finding the Fourth Proportional to 6,462.99, 8,918.69 and 3,949.31

Step by Step Solution

1. Step 1: Write the proportion equation
   6,462.99 : 8,918.69 = 3,949.31 : x
2. Step 2: Convert to fraction form
   6,462.99/8,918.69 = 3,949.31/x
3. Step 3: Cross multiply
   6,462.99x = 8,918.69 × 3,949.31
4. Step 4: Simplify right side
   6,462.99x = 35,222,646.20
5. Step 5: Solve for x
   x = 35,222,646.20/6,462.99
6. Step 6: Final answer
   x = 5,449.90