Finding the Third Proportional to 3,807,609 and 8,309,760

Step by Step Solution

1. Step 1: Write the proportion equation
   3,807,609 : 8,309,760 = 8,309,760 : x
2. Step 2: Convert to fraction form
   3,807,609/8,309,760 = 8,309,760/x
3. Step 3: Cross multiply
   3,807,609x = 8,309,760 × 8,309,760
4. Step 4: Simplify right side
   3,807,609x = 69,052,111,257,600
5. Step 5: Solve for x
   x = 69,052,111,257,600/3,807,609
6. Step 6: Final answer
   x = 18,135,294.68