Finding the Third Proportional to 303,144 and 636,744

Step by Step Solution

1. Step 1: Write the proportion equation
   303,144 : 636,744 = 636,744 : x
2. Step 2: Convert to fraction form
   303,144/636,744 = 636,744/x
3. Step 3: Cross multiply
   303,144x = 636,744 × 636,744
4. Step 4: Simplify right side
   303,144x = 405,442,921,536
5. Step 5: Solve for x
   x = 405,442,921,536/303,144
6. Step 6: Final answer
   x = 1,337,459.83