Finding the Third Proportional to 3,807,589 and 8,309,693

Step by Step Solution

1. Step 1: Write the proportion equation
   3,807,589 : 8,309,693 = 8,309,693 : x
2. Step 2: Convert to fraction form
   3,807,589/8,309,693 = 8,309,693/x
3. Step 3: Cross multiply
   3,807,589x = 8,309,693 × 8,309,693
4. Step 4: Simplify right side
   3,807,589x = 69,050,997,754,249
5. Step 5: Solve for x
   x = 69,050,997,754,249/3,807,589
6. Step 6: Final answer
   x = 18,135,097.50