Finding the Third Proportional to 628,668 and 1,286,388

Step by Step Solution

1. Step 1: Write the proportion equation
   628,668 : 1,286,388 = 1,286,388 : x
2. Step 2: Convert to fraction form
   628,668/1,286,388 = 1,286,388/x
3. Step 3: Cross multiply
   628,668x = 1,286,388 × 1,286,388
4. Step 4: Simplify right side
   628,668x = 1,654,794,086,544
5. Step 5: Solve for x
   x = 1,654,794,086,544/628,668
6. Step 6: Final answer
   x = 2,632,222.55