Finding the Third Proportional to 302,708 and 642,313.50

Step by Step Solution

1. Step 1: Write the proportion equation
   302,708 : 642,313.50 = 642,313.50 : x
2. Step 2: Convert to fraction form
   302,708/642,313.50 = 642,313.50/x
3. Step 3: Cross multiply
   302,708x = 642,313.50 × 642,313.50
4. Step 4: Simplify right side
   302,708x = 412,566,632,282.25
5. Step 5: Solve for x
   x = 412,566,632,282.25/302,708
6. Step 6: Final answer
   x = 1,362,919.49