Finding the Fourth Proportional to 2,587.98, 3,571.31 and 1,409.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,587.98 : 3,571.31 = 1,409.05 : x
2. Step 2: Convert to fraction form
   2,587.98/3,571.31 = 1,409.05/x
3. Step 3: Cross multiply
   2,587.98x = 3,571.31 × 1,409.05
4. Step 4: Simplify right side
   2,587.98x = 5,032,156.24
5. Step 5: Solve for x
   x = 5,032,156.24/2,587.98
6. Step 6: Final answer
   x = 1,944.43