Finding the Third Proportional to 3,913,910 and 5,511,638

Step by Step Solution

1. Step 1: Write the proportion equation
   3,913,910 : 5,511,638 = 5,511,638 : x
2. Step 2: Convert to fraction form
   3,913,910/5,511,638 = 5,511,638/x
3. Step 3: Cross multiply
   3,913,910x = 5,511,638 × 5,511,638
4. Step 4: Simplify right side
   3,913,910x = 30,378,153,443,044
5. Step 5: Solve for x
   x = 30,378,153,443,044/3,913,910
6. Step 6: Final answer
   x = 7,761,587.12