Finding the Third Proportional to 142,664 and 303,760

Step by Step Solution

1. Step 1: Write the proportion equation
   142,664 : 303,760 = 303,760 : x
2. Step 2: Convert to fraction form
   142,664/303,760 = 303,760/x
3. Step 3: Cross multiply
   142,664x = 303,760 × 303,760
4. Step 4: Simplify right side
   142,664x = 92,270,137,600
5. Step 5: Solve for x
   x = 92,270,137,600/142,664
6. Step 6: Final answer
   x = 646,765.39