Finding the Fourth Proportional to 2,587.34, 3,570.51 and 1,408.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,587.34 : 3,570.51 = 1,408.40 : x
2. Step 2: Convert to fraction form
   2,587.34/3,570.51 = 1,408.40/x
3. Step 3: Cross multiply
   2,587.34x = 3,570.51 × 1,408.40
4. Step 4: Simplify right side
   2,587.34x = 5,028,706.28
5. Step 5: Solve for x
   x = 5,028,706.28/2,587.34
6. Step 6: Final answer
   x = 1,943.58