Finding the Third Proportional to 3,971,826 and 8,485,856

Step by Step Solution

1. Step 1: Write the proportion equation
   3,971,826 : 8,485,856 = 8,485,856 : x
2. Step 2: Convert to fraction form
   3,971,826/8,485,856 = 8,485,856/x
3. Step 3: Cross multiply
   3,971,826x = 8,485,856 × 8,485,856
4. Step 4: Simplify right side
   3,971,826x = 72,009,752,052,736
5. Step 5: Solve for x
   x = 72,009,752,052,736/3,971,826
6. Step 6: Final answer
   x = 18,130,137.64