Finding the Third Proportional to 3,521,399 and 7,717,852

Step by Step Solution

1. Step 1: Write the proportion equation
   3,521,399 : 7,717,852 = 7,717,852 : x
2. Step 2: Convert to fraction form
   3,521,399/7,717,852 = 7,717,852/x
3. Step 3: Cross multiply
   3,521,399x = 7,717,852 × 7,717,852
4. Step 4: Simplify right side
   3,521,399x = 59,565,239,493,904
5. Step 5: Solve for x
   x = 59,565,239,493,904/3,521,399
6. Step 6: Final answer
   x = 16,915,220.20