Finding the Third Proportional to 144,616.50 and 311,427

Step by Step Solution

1. Step 1: Write the proportion equation
   144,616.50 : 311,427 = 311,427 : x
2. Step 2: Convert to fraction form
   144,616.50/311,427 = 311,427/x
3. Step 3: Cross multiply
   144,616.50x = 311,427 × 311,427
4. Step 4: Simplify right side
   144,616.50x = 96,986,776,329
5. Step 5: Solve for x
   x = 96,986,776,329/144,616.50
6. Step 6: Final answer
   x = 670,648.07