Finding the Third Proportional to 1,438,890 and 2,111,671

Step by Step Solution

1. Step 1: Write the proportion equation
   1,438,890 : 2,111,671 = 2,111,671 : x
2. Step 2: Convert to fraction form
   1,438,890/2,111,671 = 2,111,671/x
3. Step 3: Cross multiply
   1,438,890x = 2,111,671 × 2,111,671
4. Step 4: Simplify right side
   1,438,890x = 4,459,154,412,241
5. Step 5: Solve for x
   x = 4,459,154,412,241/1,438,890
6. Step 6: Final answer
   x = 3,099,023.84