Finding the Third Proportional to 311,853 and 673,561.50

Step by Step Solution

1. Step 1: Write the proportion equation
   311,853 : 673,561.50 = 673,561.50 : x
2. Step 2: Convert to fraction form
   311,853/673,561.50 = 673,561.50/x
3. Step 3: Cross multiply
   311,853x = 673,561.50 × 673,561.50
4. Step 4: Simplify right side
   311,853x = 453,685,094,282.25
5. Step 5: Solve for x
   x = 453,685,094,282.25/311,853
6. Step 6: Final answer
   x = 1,454,804.33