Finding the Third Proportional to 3,807,603 and 8,309,748

Step by Step Solution

1. Step 1: Write the proportion equation
   3,807,603 : 8,309,748 = 8,309,748 : x
2. Step 2: Convert to fraction form
   3,807,603/8,309,748 = 8,309,748/x
3. Step 3: Cross multiply
   3,807,603x = 8,309,748 × 8,309,748
4. Step 4: Simplify right side
   3,807,603x = 69,051,911,823,504
5. Step 5: Solve for x
   x = 69,051,911,823,504/3,807,603
6. Step 6: Final answer
   x = 18,135,270.88