Finding the Fourth Proportional to 2,087.22, 2,874.24 and 1,866.09

Step by Step Solution

1. Step 1: Write the proportion equation
   2,087.22 : 2,874.24 = 1,866.09 : x
2. Step 2: Convert to fraction form
   2,087.22/2,874.24 = 1,866.09/x
3. Step 3: Cross multiply
   2,087.22x = 2,874.24 × 1,866.09
4. Step 4: Simplify right side
   2,087.22x = 5,363,590.52
5. Step 5: Solve for x
   x = 5,363,590.52/2,087.22
6. Step 6: Final answer
   x = 2,569.73