Finding the Fourth Proportional to 2,659.21, 3,990.17 and 1,198.02

Step by Step Solution

1. Step 1: Write the proportion equation
   2,659.21 : 3,990.17 = 1,198.02 : x
2. Step 2: Convert to fraction form
   2,659.21/3,990.17 = 1,198.02/x
3. Step 3: Cross multiply
   2,659.21x = 3,990.17 × 1,198.02
4. Step 4: Simplify right side
   2,659.21x = 4,780,303.46
5. Step 5: Solve for x
   x = 4,780,303.46/2,659.21
6. Step 6: Final answer
   x = 1,797.64