Finding the Third Proportional to 3,661,209 and 7,873,398

Step by Step Solution

1. Step 1: Write the proportion equation
   3,661,209 : 7,873,398 = 7,873,398 : x
2. Step 2: Convert to fraction form
   3,661,209/7,873,398 = 7,873,398/x
3. Step 3: Cross multiply
   3,661,209x = 7,873,398 × 7,873,398
4. Step 4: Simplify right side
   3,661,209x = 61,990,396,066,404
5. Step 5: Solve for x
   x = 61,990,396,066,404/3,661,209
6. Step 6: Final answer
   x = 16,931,673.68