Finding the Third Proportional to 315,992 and 676,456

Step by Step Solution

1. Step 1: Write the proportion equation
   315,992 : 676,456 = 676,456 : x
2. Step 2: Convert to fraction form
   315,992/676,456 = 676,456/x
3. Step 3: Cross multiply
   315,992x = 676,456 × 676,456
4. Step 4: Simplify right side
   315,992x = 457,592,719,936
5. Step 5: Solve for x
   x = 457,592,719,936/315,992
6. Step 6: Final answer
   x = 1,448,114.89