Finding the Third Proportional to 300,872 and 660,790

Step by Step Solution

1. Step 1: Write the proportion equation
   300,872 : 660,790 = 660,790 : x
2. Step 2: Convert to fraction form
   300,872/660,790 = 660,790/x
3. Step 3: Cross multiply
   300,872x = 660,790 × 660,790
4. Step 4: Simplify right side
   300,872x = 436,643,424,100
5. Step 5: Solve for x
   x = 436,643,424,100/300,872
6. Step 6: Final answer
   x = 1,451,259.75