Finding the Third Proportional to 456.50 and 1,087

Step by Step Solution

1. Step 1: Write the proportion equation
   456.50 : 1,087 = 1,087 : x
2. Step 2: Convert to fraction form
   456.50/1,087 = 1,087/x
3. Step 3: Cross multiply
   456.50x = 1,087 × 1,087
4. Step 4: Simplify right side
   456.50x = 1,181,569
5. Step 5: Solve for x
   x = 1,181,569/456.50
6. Step 6: Final answer
   x = 2,588.32