Finding the Fourth Proportional to 2,087.19, 2,879.16 and 1,340.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,087.19 : 2,879.16 = 1,340.31 : x
2. Step 2: Convert to fraction form
   2,087.19/2,879.16 = 1,340.31/x
3. Step 3: Cross multiply
   2,087.19x = 2,879.16 × 1,340.31
4. Step 4: Simplify right side
   2,087.19x = 3,858,966.94
5. Step 5: Solve for x
   x = 3,858,966.94/2,087.19
6. Step 6: Final answer
   x = 1,848.88