Finding the Third Proportional to 443,632 and 620,872

Step by Step Solution

1. Step 1: Write the proportion equation
   443,632 : 620,872 = 620,872 : x
2. Step 2: Convert to fraction form
   443,632/620,872 = 620,872/x
3. Step 3: Cross multiply
   443,632x = 620,872 × 620,872
4. Step 4: Simplify right side
   443,632x = 385,482,040,384
5. Step 5: Solve for x
   x = 385,482,040,384/443,632
6. Step 6: Final answer
   x = 868,922.98