Finding the Third Proportional to 2,891,037,138 and 3,900,687,868

Step by Step Solution

1. Step 1: Write the proportion equation
   2,891,037,138 : 3,900,687,868 = 3,900,687,868 : x
2. Step 2: Convert to fraction form
   2,891,037,138/3,900,687,868 = 3,900,687,868/x
3. Step 3: Cross multiply
   2,891,037,138x = 3,900,687,868 × 3,900,687,868
4. Step 4: Simplify right side
   2,891,037,138x = 15,215,365,843,562,385,408
5. Step 5: Solve for x
   x = 15,215,365,843,562,385,408/2,891,037,138
6. Step 6: Final answer
   x = 5,262,943,752.46