Finding the Third Proportional to 300,891 and 660,822

Step by Step Solution

1. Step 1: Write the proportion equation
   300,891 : 660,822 = 660,822 : x
2. Step 2: Convert to fraction form
   300,891/660,822 = 660,822/x
3. Step 3: Cross multiply
   300,891x = 660,822 × 660,822
4. Step 4: Simplify right side
   300,891x = 436,685,715,684
5. Step 5: Solve for x
   x = 436,685,715,684/300,891
6. Step 6: Final answer
   x = 1,451,308.67