Finding the Third Proportional to 1,212,723 and 2,640,595

Step by Step Solution

1. Step 1: Write the proportion equation
   1,212,723 : 2,640,595 = 2,640,595 : x
2. Step 2: Convert to fraction form
   1,212,723/2,640,595 = 2,640,595/x
3. Step 3: Cross multiply
   1,212,723x = 2,640,595 × 2,640,595
4. Step 4: Simplify right side
   1,212,723x = 6,972,741,954,025
5. Step 5: Solve for x
   x = 6,972,741,954,025/1,212,723
6. Step 6: Final answer
   x = 5,749,657.55