Finding the Third Proportional to 1,215,717 and 2,645,499

Step by Step Solution

1. Step 1: Write the proportion equation
   1,215,717 : 2,645,499 = 2,645,499 : x
2. Step 2: Convert to fraction form
   1,215,717/2,645,499 = 2,645,499/x
3. Step 3: Cross multiply
   1,215,717x = 2,645,499 × 2,645,499
4. Step 4: Simplify right side
   1,215,717x = 6,998,664,959,001
5. Step 5: Solve for x
   x = 6,998,664,959,001/1,215,717
6. Step 6: Final answer
   x = 5,756,820.84