Finding the Fourth Proportional to 2,587.10, 3,570.09 and 1,408.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,587.10 : 3,570.09 = 1,408.10 : x
2. Step 2: Convert to fraction form
   2,587.10/3,570.09 = 1,408.10/x
3. Step 3: Cross multiply
   2,587.10x = 3,570.09 × 1,408.10
4. Step 4: Simplify right side
   2,587.10x = 5,027,043.73
5. Step 5: Solve for x
   x = 5,027,043.73/2,587.10
6. Step 6: Final answer
   x = 1,943.12