Finding the Third Proportional to 339,436 and 706,760

Step by Step Solution

1. Step 1: Write the proportion equation
   339,436 : 706,760 = 706,760 : x
2. Step 2: Convert to fraction form
   339,436/706,760 = 706,760/x
3. Step 3: Cross multiply
   339,436x = 706,760 × 706,760
4. Step 4: Simplify right side
   339,436x = 499,509,697,600
5. Step 5: Solve for x
   x = 499,509,697,600/339,436
6. Step 6: Final answer
   x = 1,471,587.27