Finding the Third Proportional to 450,513 and 800,864

Step by Step Solution

1. Step 1: Write the proportion equation
   450,513 : 800,864 = 800,864 : x
2. Step 2: Convert to fraction form
   450,513/800,864 = 800,864/x
3. Step 3: Cross multiply
   450,513x = 800,864 × 800,864
4. Step 4: Simplify right side
   450,513x = 641,383,146,496
5. Step 5: Solve for x
   x = 641,383,146,496/450,513
6. Step 6: Final answer
   x = 1,423,672.89