Finding the Fourth Proportional to 2,086.59, 2,879.50 and 1,155.09

Step by Step Solution

1. Step 1: Write the proportion equation
   2,086.59 : 2,879.50 = 1,155.09 : x
2. Step 2: Convert to fraction form
   2,086.59/2,879.50 = 1,155.09/x
3. Step 3: Cross multiply
   2,086.59x = 2,879.50 × 1,155.09
4. Step 4: Simplify right side
   2,086.59x = 3,326,091.73
5. Step 5: Solve for x
   x = 3,326,091.73/2,086.59
6. Step 6: Final answer
   x = 1,594.03