Finding the Fourth Proportional to 2,087.09, 3,145.31 and 1,879.11

Step by Step Solution

1. Step 1: Write the proportion equation
   2,087.09 : 3,145.31 = 1,879.11 : x
2. Step 2: Convert to fraction form
   2,087.09/3,145.31 = 1,879.11/x
3. Step 3: Cross multiply
   2,087.09x = 3,145.31 × 1,879.11
4. Step 4: Simplify right side
   2,087.09x = 5,910,383.24
5. Step 5: Solve for x
   x = 5,910,383.24/2,087.09
6. Step 6: Final answer
   x = 2,831.88