Finding the Fourth Proportional to 2,587.28, 3,570.45 and 1,408.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,587.28 : 3,570.45 = 1,408.34 : x
2. Step 2: Convert to fraction form
   2,587.28/3,570.45 = 1,408.34/x
3. Step 3: Cross multiply
   2,587.28x = 3,570.45 × 1,408.34
4. Step 4: Simplify right side
   2,587.28x = 5,028,411.20
5. Step 5: Solve for x
   x = 5,028,411.20/2,587.28
6. Step 6: Final answer
   x = 1,943.52