Finding the Third Proportional to 455,446 and 723,870

Step by Step Solution

1. Step 1: Write the proportion equation
   455,446 : 723,870 = 723,870 : x
2. Step 2: Convert to fraction form
   455,446/723,870 = 723,870/x
3. Step 3: Cross multiply
   455,446x = 723,870 × 723,870
4. Step 4: Simplify right side
   455,446x = 523,987,776,900
5. Step 5: Solve for x
   x = 523,987,776,900/455,446
6. Step 6: Final answer
   x = 1,150,493.75