Finding the Third Proportional to 1,212,736 and 2,640,624

Step by Step Solution

1. Step 1: Write the proportion equation
   1,212,736 : 2,640,624 = 2,640,624 : x
2. Step 2: Convert to fraction form
   1,212,736/2,640,624 = 2,640,624/x
3. Step 3: Cross multiply
   1,212,736x = 2,640,624 × 2,640,624
4. Step 4: Simplify right side
   1,212,736x = 6,972,895,109,376
5. Step 5: Solve for x
   x = 6,972,895,109,376/1,212,736
6. Step 6: Final answer
   x = 5,749,722.21