Finding the Third Proportional to 4,040,391 and 8,977,638

Step by Step Solution

1. Step 1: Write the proportion equation
   4,040,391 : 8,977,638 = 8,977,638 : x
2. Step 2: Convert to fraction form
   4,040,391/8,977,638 = 8,977,638/x
3. Step 3: Cross multiply
   4,040,391x = 8,977,638 × 8,977,638
4. Step 4: Simplify right side
   4,040,391x = 80,597,984,059,044
5. Step 5: Solve for x
   x = 80,597,984,059,044/4,040,391
6. Step 6: Final answer
   x = 19,948,065.44