Finding the Third Proportional to 2,891,037,538 and 3,900,688,387

Step by Step Solution

1. Step 1: Write the proportion equation
   2,891,037,538 : 3,900,688,387 = 3,900,688,387 : x
2. Step 2: Convert to fraction form
   2,891,037,538/3,900,688,387 = 3,900,688,387/x
3. Step 3: Cross multiply
   2,891,037,538x = 3,900,688,387 × 3,900,688,387
4. Step 4: Simplify right side
   2,891,037,538x = 15,215,369,892,476,661,760
5. Step 5: Solve for x
   x = 15,215,369,892,476,661,760/2,891,037,538
6. Step 6: Final answer
   x = 5,262,944,424.79