Finding the Third Proportional to 3,807,612 and 8,309,766

Step by Step Solution

1. Step 1: Write the proportion equation
   3,807,612 : 8,309,766 = 8,309,766 : x
2. Step 2: Convert to fraction form
   3,807,612/8,309,766 = 8,309,766/x
3. Step 3: Cross multiply
   3,807,612x = 8,309,766 × 8,309,766
4. Step 4: Simplify right side
   3,807,612x = 69,052,210,974,756
5. Step 5: Solve for x
   x = 69,052,210,974,756/3,807,612
6. Step 6: Final answer
   x = 18,135,306.58