Finding the Fourth Proportional to 1,872.88, 2,584.56 and 1,087

Step by Step Solution

1. Step 1: Write the proportion equation
   1,872.88 : 2,584.56 = 1,087 : x
2. Step 2: Convert to fraction form
   1,872.88/2,584.56 = 1,087/x
3. Step 3: Cross multiply
   1,872.88x = 2,584.56 × 1,087
4. Step 4: Simplify right side
   1,872.88x = 2,809,416.72
5. Step 5: Solve for x
   x = 2,809,416.72/1,872.88
6. Step 6: Final answer
   x = 1,500.05