Finding the Third Proportional to 4,039,872 and 8,709,504

Step by Step Solution

1. Step 1: Write the proportion equation
   4,039,872 : 8,709,504 = 8,709,504 : x
2. Step 2: Convert to fraction form
   4,039,872/8,709,504 = 8,709,504/x
3. Step 3: Cross multiply
   4,039,872x = 8,709,504 × 8,709,504
4. Step 4: Simplify right side
   4,039,872x = 75,855,459,926,016
5. Step 5: Solve for x
   x = 75,855,459,926,016/4,039,872
6. Step 6: Final answer
   x = 18,776,698.85