Finding the Third Proportional to 315,632 and 679,384

Step by Step Solution

1. Step 1: Write the proportion equation
   315,632 : 679,384 = 679,384 : x
2. Step 2: Convert to fraction form
   315,632/679,384 = 679,384/x
3. Step 3: Cross multiply
   315,632x = 679,384 × 679,384
4. Step 4: Simplify right side
   315,632x = 461,562,619,456
5. Step 5: Solve for x
   x = 461,562,619,456/315,632
6. Step 6: Final answer
   x = 1,462,344.18