Finding the Third Proportional to 3,955,801 and 8,121,311

Step by Step Solution

1. Step 1: Write the proportion equation
   3,955,801 : 8,121,311 = 8,121,311 : x
2. Step 2: Convert to fraction form
   3,955,801/8,121,311 = 8,121,311/x
3. Step 3: Cross multiply
   3,955,801x = 8,121,311 × 8,121,311
4. Step 4: Simplify right side
   3,955,801x = 65,955,692,358,721
5. Step 5: Solve for x
   x = 65,955,692,358,721/3,955,801
6. Step 6: Final answer
   x = 16,673,157.31