Finding the Third Proportional to 810.75 and 1,087.69

Step by Step Solution

1. Step 1: Write the proportion equation
   810.75 : 1,087.69 = 1,087.69 : x
2. Step 2: Convert to fraction form
   810.75/1,087.69 = 1,087.69/x
3. Step 3: Cross multiply
   810.75x = 1,087.69 × 1,087.69
4. Step 4: Simplify right side
   810.75x = 1,183,064.10
5. Step 5: Solve for x
   x = 1,183,064.10/810.75
6. Step 6: Final answer
   x = 1,459.22