Finding the Third Proportional to 339,399 and 706,369.50

Step by Step Solution

1. Step 1: Write the proportion equation
   339,399 : 706,369.50 = 706,369.50 : x
2. Step 2: Convert to fraction form
   339,399/706,369.50 = 706,369.50/x
3. Step 3: Cross multiply
   339,399x = 706,369.50 × 706,369.50
4. Step 4: Simplify right side
   339,399x = 498,957,870,530.25
5. Step 5: Solve for x
   x = 498,957,870,530.25/339,399
6. Step 6: Final answer
   x = 1,470,121.81