Finding the Third Proportional to 2,485,728 and 3,929,886

Step by Step Solution

1. Step 1: Write the proportion equation
   2,485,728 : 3,929,886 = 3,929,886 : x
2. Step 2: Convert to fraction form
   2,485,728/3,929,886 = 3,929,886/x
3. Step 3: Cross multiply
   2,485,728x = 3,929,886 × 3,929,886
4. Step 4: Simplify right side
   2,485,728x = 15,444,003,972,996
5. Step 5: Solve for x
   x = 15,444,003,972,996/2,485,728
6. Step 6: Final answer
   x = 6,213,070.77