Finding the Third Proportional to 2,789,991 and 3,948,921

Step by Step Solution

1. Step 1: Write the proportion equation
   2,789,991 : 3,948,921 = 3,948,921 : x
2. Step 2: Convert to fraction form
   2,789,991/3,948,921 = 3,948,921/x
3. Step 3: Cross multiply
   2,789,991x = 3,948,921 × 3,948,921
4. Step 4: Simplify right side
   2,789,991x = 15,593,977,064,241
5. Step 5: Solve for x
   x = 15,593,977,064,241/2,789,991
6. Step 6: Final answer
   x = 5,589,257.12