Finding the Third Proportional to 3,955,800 and 8,121,309

Step by Step Solution

1. Step 1: Write the proportion equation
   3,955,800 : 8,121,309 = 8,121,309 : x
2. Step 2: Convert to fraction form
   3,955,800/8,121,309 = 8,121,309/x
3. Step 3: Cross multiply
   3,955,800x = 8,121,309 × 8,121,309
4. Step 4: Simplify right side
   3,955,800x = 65,955,659,873,481
5. Step 5: Solve for x
   x = 65,955,659,873,481/3,955,800
6. Step 6: Final answer
   x = 16,673,153.31