Finding the Third Proportional to 314,790 and 674,456

Step by Step Solution

1. Step 1: Write the proportion equation
   314,790 : 674,456 = 674,456 : x
2. Step 2: Convert to fraction form
   314,790/674,456 = 674,456/x
3. Step 3: Cross multiply
   314,790x = 674,456 × 674,456
4. Step 4: Simplify right side
   314,790x = 454,890,895,936
5. Step 5: Solve for x
   x = 454,890,895,936/314,790
6. Step 6: Final answer
   x = 1,445,061.46