Finding the Third Proportional to 685.50 and 1,049

Step by Step Solution

1. Step 1: Write the proportion equation
   685.50 : 1,049 = 1,049 : x
2. Step 2: Convert to fraction form
   685.50/1,049 = 1,049/x
3. Step 3: Cross multiply
   685.50x = 1,049 × 1,049
4. Step 4: Simplify right side
   685.50x = 1,100,401
5. Step 5: Solve for x
   x = 1,100,401/685.50
6. Step 6: Final answer
   x = 1,605.25