Finding the Fourth Proportional to 2,086.93, 2,879.99 and 1,142.74

Step by Step Solution

1. Step 1: Write the proportion equation
   2,086.93 : 2,879.99 = 1,142.74 : x
2. Step 2: Convert to fraction form
   2,086.93/2,879.99 = 1,142.74/x
3. Step 3: Cross multiply
   2,086.93x = 2,879.99 × 1,142.74
4. Step 4: Simplify right side
   2,086.93x = 3,291,081.94
5. Step 5: Solve for x
   x = 3,291,081.94/2,086.93
6. Step 6: Final answer
   x = 1,577.00