Finding the Third Proportional to 311,856 and 673,567.50

Step by Step Solution

1. Step 1: Write the proportion equation
   311,856 : 673,567.50 = 673,567.50 : x
2. Step 2: Convert to fraction form
   311,856/673,567.50 = 673,567.50/x
3. Step 3: Cross multiply
   311,856x = 673,567.50 × 673,567.50
4. Step 4: Simplify right side
   311,856x = 453,693,177,056.25
5. Step 5: Solve for x
   x = 453,693,177,056.25/311,856
6. Step 6: Final answer
   x = 1,454,816.25