Finding the Third Proportional to 3,939,554 and 8,467,618

Step by Step Solution

1. Step 1: Write the proportion equation
   3,939,554 : 8,467,618 = 8,467,618 : x
2. Step 2: Convert to fraction form
   3,939,554/8,467,618 = 8,467,618/x
3. Step 3: Cross multiply
   3,939,554x = 8,467,618 × 8,467,618
4. Step 4: Simplify right side
   3,939,554x = 71,700,554,593,924
5. Step 5: Solve for x
   x = 71,700,554,593,924/3,939,554
6. Step 6: Final answer
   x = 18,200,170.53