Finding the Fourth Proportional to 2,587.71, 3,571.01 and 1,408.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,587.71 : 3,571.01 = 1,408.78 : x
2. Step 2: Convert to fraction form
   2,587.71/3,571.01 = 1,408.78/x
3. Step 3: Cross multiply
   2,587.71x = 3,571.01 × 1,408.78
4. Step 4: Simplify right side
   2,587.71x = 5,030,784.18
5. Step 5: Solve for x
   x = 5,030,784.18/2,587.71
6. Step 6: Final answer
   x = 1,944.10