Finding the Third Proportional to 315,723 and 697,892

Step by Step Solution

1. Step 1: Write the proportion equation
   315,723 : 697,892 = 697,892 : x
2. Step 2: Convert to fraction form
   315,723/697,892 = 697,892/x
3. Step 3: Cross multiply
   315,723x = 697,892 × 697,892
4. Step 4: Simplify right side
   315,723x = 487,053,243,664
5. Step 5: Solve for x
   x = 487,053,243,664/315,723
6. Step 6: Final answer
   x = 1,542,660.00