Finding the Third Proportional to 2,172,868 and 3,439,871

Step by Step Solution

1. Step 1: Write the proportion equation
   2,172,868 : 3,439,871 = 3,439,871 : x
2. Step 2: Convert to fraction form
   2,172,868/3,439,871 = 3,439,871/x
3. Step 3: Cross multiply
   2,172,868x = 3,439,871 × 3,439,871
4. Step 4: Simplify right side
   2,172,868x = 11,832,712,496,641
5. Step 5: Solve for x
   x = 11,832,712,496,641/2,172,868
6. Step 6: Final answer
   x = 5,445,665.59