Finding the Third Proportional to 3,489,016 and 7,400,780

Step by Step Solution

1. Step 1: Write the proportion equation
   3,489,016 : 7,400,780 = 7,400,780 : x
2. Step 2: Convert to fraction form
   3,489,016/7,400,780 = 7,400,780/x
3. Step 3: Cross multiply
   3,489,016x = 7,400,780 × 7,400,780
4. Step 4: Simplify right side
   3,489,016x = 54,771,544,608,400
5. Step 5: Solve for x
   x = 54,771,544,608,400/3,489,016
6. Step 6: Final answer
   x = 15,698,278.43