Finding the Fourth Proportional to 2,587.05, 3,570.13 and 1,408.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,587.05 : 3,570.13 = 1,408.12 : x
2. Step 2: Convert to fraction form
   2,587.05/3,570.13 = 1,408.12/x
3. Step 3: Cross multiply
   2,587.05x = 3,570.13 × 1,408.12
4. Step 4: Simplify right side
   2,587.05x = 5,027,167.94
5. Step 5: Solve for x
   x = 5,027,167.94/2,587.05
6. Step 6: Final answer
   x = 1,943.21