Finding the Third Proportional to 4,040,390 and 8,977,636

Step by Step Solution

1. Step 1: Write the proportion equation
   4,040,390 : 8,977,636 = 8,977,636 : x
2. Step 2: Convert to fraction form
   4,040,390/8,977,636 = 8,977,636/x
3. Step 3: Cross multiply
   4,040,390x = 8,977,636 × 8,977,636
4. Step 4: Simplify right side
   4,040,390x = 80,597,948,148,496
5. Step 5: Solve for x
   x = 80,597,948,148,496/4,040,390
6. Step 6: Final answer
   x = 19,948,061.49