Finding the Third Proportional to 550,408 and 1,212,564

Step by Step Solution

1. Step 1: Write the proportion equation
   550,408 : 1,212,564 = 1,212,564 : x
2. Step 2: Convert to fraction form
   550,408/1,212,564 = 1,212,564/x
3. Step 3: Cross multiply
   550,408x = 1,212,564 × 1,212,564
4. Step 4: Simplify right side
   550,408x = 1,470,311,454,096
5. Step 5: Solve for x
   x = 1,470,311,454,096/550,408
6. Step 6: Final answer
   x = 2,671,311.93