Finding the Third Proportional to 1,397,556 and 2,109,618

Step by Step Solution

1. Step 1: Write the proportion equation
   1,397,556 : 2,109,618 = 2,109,618 : x
2. Step 2: Convert to fraction form
   1,397,556/2,109,618 = 2,109,618/x
3. Step 3: Cross multiply
   1,397,556x = 2,109,618 × 2,109,618
4. Step 4: Simplify right side
   1,397,556x = 4,450,488,105,924
5. Step 5: Solve for x
   x = 4,450,488,105,924/1,397,556
6. Step 6: Final answer
   x = 3,184,479.27