Finding the Fourth Proportional to 6,658.42, 9,987.72 and 3,198.10

Step by Step Solution

1. Step 1: Write the proportion equation
   6,658.42 : 9,987.72 = 3,198.10 : x
2. Step 2: Convert to fraction form
   6,658.42/9,987.72 = 3,198.10/x
3. Step 3: Cross multiply
   6,658.42x = 9,987.72 × 3,198.10
4. Step 4: Simplify right side
   6,658.42x = 31,941,727.33
5. Step 5: Solve for x
   x = 31,941,727.33/6,658.42
6. Step 6: Final answer
   x = 4,797.19