Finding the Third Proportional to 3,690,672 and 7,987,872

Step by Step Solution

1. Step 1: Write the proportion equation
   3,690,672 : 7,987,872 = 7,987,872 : x
2. Step 2: Convert to fraction form
   3,690,672/7,987,872 = 7,987,872/x
3. Step 3: Cross multiply
   3,690,672x = 7,987,872 × 7,987,872
4. Step 4: Simplify right side
   3,690,672x = 63,806,099,088,384
5. Step 5: Solve for x
   x = 63,806,099,088,384/3,690,672
6. Step 6: Final answer
   x = 17,288,477.30