Finding the Third Proportional to 673.38 and 1,039.69

Step by Step Solution

1. Step 1: Write the proportion equation
   673.38 : 1,039.69 = 1,039.69 : x
2. Step 2: Convert to fraction form
   673.38/1,039.69 = 1,039.69/x
3. Step 3: Cross multiply
   673.38x = 1,039.69 × 1,039.69
4. Step 4: Simplify right side
   673.38x = 1,080,950.10
5. Step 5: Solve for x
   x = 1,080,950.10/673.38
6. Step 6: Final answer
   x = 1,605.27