Finding the Third Proportional to 309,132 and 674,100

Step by Step Solution

1. Step 1: Write the proportion equation
   309,132 : 674,100 = 674,100 : x
2. Step 2: Convert to fraction form
   309,132/674,100 = 674,100/x
3. Step 3: Cross multiply
   309,132x = 674,100 × 674,100
4. Step 4: Simplify right side
   309,132x = 454,410,810,000
5. Step 5: Solve for x
   x = 454,410,810,000/309,132
6. Step 6: Final answer
   x = 1,469,957.20