Finding the Fourth Proportional to 1,587.87, 2,375.33 and 1,280.07

Step by Step Solution

1. Step 1: Write the proportion equation
   1,587.87 : 2,375.33 = 1,280.07 : x
2. Step 2: Convert to fraction form
   1,587.87/2,375.33 = 1,280.07/x
3. Step 3: Cross multiply
   1,587.87x = 2,375.33 × 1,280.07
4. Step 4: Simplify right side
   1,587.87x = 3,040,582.27
5. Step 5: Solve for x
   x = 3,040,582.27/1,587.87
6. Step 6: Final answer
   x = 1,914.88