Finding the Third Proportional to 300,916 and 660,872

Step by Step Solution

1. Step 1: Write the proportion equation
   300,916 : 660,872 = 660,872 : x
2. Step 2: Convert to fraction form
   300,916/660,872 = 660,872/x
3. Step 3: Cross multiply
   300,916x = 660,872 × 660,872
4. Step 4: Simplify right side
   300,916x = 436,751,800,384
5. Step 5: Solve for x
   x = 436,751,800,384/300,916
6. Step 6: Final answer
   x = 1,451,407.70