Finding the Third Proportional to 311,868 and 673,591.50

Step by Step Solution

1. Step 1: Write the proportion equation
   311,868 : 673,591.50 = 673,591.50 : x
2. Step 2: Convert to fraction form
   311,868/673,591.50 = 673,591.50/x
3. Step 3: Cross multiply
   311,868x = 673,591.50 × 673,591.50
4. Step 4: Simplify right side
   311,868x = 453,725,508,872.25
5. Step 5: Solve for x
   x = 453,725,508,872.25/311,868
6. Step 6: Final answer
   x = 1,454,863.95