Finding the Third Proportional to 339,568 and 707,040

Step by Step Solution

1. Step 1: Write the proportion equation
   339,568 : 707,040 = 707,040 : x
2. Step 2: Convert to fraction form
   339,568/707,040 = 707,040/x
3. Step 3: Cross multiply
   339,568x = 707,040 × 707,040
4. Step 4: Simplify right side
   339,568x = 499,905,561,600
5. Step 5: Solve for x
   x = 499,905,561,600/339,568
6. Step 6: Final answer
   x = 1,472,181.01