Finding the Third Proportional to 685,486 and 1,067,271

Step by Step Solution

1. Step 1: Write the proportion equation
   685,486 : 1,067,271 = 1,067,271 : x
2. Step 2: Convert to fraction form
   685,486/1,067,271 = 1,067,271/x
3. Step 3: Cross multiply
   685,486x = 1,067,271 × 1,067,271
4. Step 4: Simplify right side
   685,486x = 1,139,067,387,441
5. Step 5: Solve for x
   x = 1,139,067,387,441/685,486
6. Step 6: Final answer
   x = 1,661,693.15