Finding the Fourth Proportional to 2,587.31, 3,570.41 and 1,408.35

Step by Step Solution

1. Step 1: Write the proportion equation
   2,587.31 : 3,570.41 = 1,408.35 : x
2. Step 2: Convert to fraction form
   2,587.31/3,570.41 = 1,408.35/x
3. Step 3: Cross multiply
   2,587.31x = 3,570.41 × 1,408.35
4. Step 4: Simplify right side
   2,587.31x = 5,028,390.44
5. Step 5: Solve for x
   x = 5,028,390.44/2,587.31
6. Step 6: Final answer
   x = 1,943.49