Finding the Third Proportional to 3,521,401 and 7,717,856

Step by Step Solution

1. Step 1: Write the proportion equation
   3,521,401 : 7,717,856 = 7,717,856 : x
2. Step 2: Convert to fraction form
   3,521,401/7,717,856 = 7,717,856/x
3. Step 3: Cross multiply
   3,521,401x = 7,717,856 × 7,717,856
4. Step 4: Simplify right side
   3,521,401x = 59,565,301,236,736
5. Step 5: Solve for x
   x = 59,565,301,236,736/3,521,401
6. Step 6: Final answer
   x = 16,915,228.13