Finding the Third Proportional to 3,980,309 and 8,705,868

Step by Step Solution

1. Step 1: Write the proportion equation
   3,980,309 : 8,705,868 = 8,705,868 : x
2. Step 2: Convert to fraction form
   3,980,309/8,705,868 = 8,705,868/x
3. Step 3: Cross multiply
   3,980,309x = 8,705,868 × 8,705,868
4. Step 4: Simplify right side
   3,980,309x = 75,792,137,633,424
5. Step 5: Solve for x
   x = 75,792,137,633,424/3,980,309
6. Step 6: Final answer
   x = 19,041,772.29