Finding the Fourth Proportional to 2,658.98, 3,989.94 and 1,198.02

Step by Step Solution

1. Step 1: Write the proportion equation
   2,658.98 : 3,989.94 = 1,198.02 : x
2. Step 2: Convert to fraction form
   2,658.98/3,989.94 = 1,198.02/x
3. Step 3: Cross multiply
   2,658.98x = 3,989.94 × 1,198.02
4. Step 4: Simplify right side
   2,658.98x = 4,780,027.92
5. Step 5: Solve for x
   x = 4,780,027.92/2,658.98
6. Step 6: Final answer
   x = 1,797.69