Finding the Third Proportional to 771 and 1,144.50

Step by Step Solution

1. Step 1: Write the proportion equation
   771 : 1,144.50 = 1,144.50 : x
2. Step 2: Convert to fraction form
   771/1,144.50 = 1,144.50/x
3. Step 3: Cross multiply
   771x = 1,144.50 × 1,144.50
4. Step 4: Simplify right side
   771x = 1,309,880.25
5. Step 5: Solve for x
   x = 1,309,880.25/771
6. Step 6: Final answer
   x = 1,698.94