Finding the Third Proportional to 311,862 and 673,578.75

Step by Step Solution

1. Step 1: Write the proportion equation
   311,862 : 673,578.75 = 673,578.75 : x
2. Step 2: Convert to fraction form
   311,862/673,578.75 = 673,578.75/x
3. Step 3: Cross multiply
   311,862x = 673,578.75 × 673,578.75
4. Step 4: Simplify right side
   311,862x = 453,708,332,451.56
5. Step 5: Solve for x
   x = 453,708,332,451.56/311,862
6. Step 6: Final answer
   x = 1,454,836.86