Finding the Fourth Proportional to 2,659.59, 3,989.82 and 1,198.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,659.59 : 3,989.82 = 1,198.86 : x
2. Step 2: Convert to fraction form
   2,659.59/3,989.82 = 1,198.86/x
3. Step 3: Cross multiply
   2,659.59x = 3,989.82 × 1,198.86
4. Step 4: Simplify right side
   2,659.59x = 4,783,235.61
5. Step 5: Solve for x
   x = 4,783,235.61/2,659.59
6. Step 6: Final answer
   x = 1,798.49