Finding the Third Proportional to 1,212,720 and 2,640,588

Step by Step Solution

1. Step 1: Write the proportion equation
   1,212,720 : 2,640,588 = 2,640,588 : x
2. Step 2: Convert to fraction form
   1,212,720/2,640,588 = 2,640,588/x
3. Step 3: Cross multiply
   1,212,720x = 2,640,588 × 2,640,588
4. Step 4: Simplify right side
   1,212,720x = 6,972,704,985,744
5. Step 5: Solve for x
   x = 6,972,704,985,744/1,212,720
6. Step 6: Final answer
   x = 5,749,641.29