Finding the Third Proportional to 144,613.50 and 311,426.25

Step by Step Solution

1. Step 1: Write the proportion equation
   144,613.50 : 311,426.25 = 311,426.25 : x
2. Step 2: Convert to fraction form
   144,613.50/311,426.25 = 311,426.25/x
3. Step 3: Cross multiply
   144,613.50x = 311,426.25 × 311,426.25
4. Step 4: Simplify right side
   144,613.50x = 96,986,309,189.06
5. Step 5: Solve for x
   x = 96,986,309,189.06/144,613.50
6. Step 6: Final answer
   x = 670,658.75