Finding the Fourth Proportional to 2,587.91, 3,571.22 and 1,408.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,587.91 : 3,571.22 = 1,408.96 : x
2. Step 2: Convert to fraction form
   2,587.91/3,571.22 = 1,408.96/x
3. Step 3: Cross multiply
   2,587.91x = 3,571.22 × 1,408.96
4. Step 4: Simplify right side
   2,587.91x = 5,031,688.28
5. Step 5: Solve for x
   x = 5,031,688.28/2,587.91
6. Step 6: Final answer
   x = 1,944.31