Finding the Third Proportional to 2,509,872 and 3,878,172

Step by Step Solution

1. Step 1: Write the proportion equation
   2,509,872 : 3,878,172 = 3,878,172 : x
2. Step 2: Convert to fraction form
   2,509,872/3,878,172 = 3,878,172/x
3. Step 3: Cross multiply
   2,509,872x = 3,878,172 × 3,878,172
4. Step 4: Simplify right side
   2,509,872x = 15,040,218,061,584
5. Step 5: Solve for x
   x = 15,040,218,061,584/2,509,872
6. Step 6: Final answer
   x = 5,992,424.34