Finding the Third Proportional to 1,294,656 and 2,640,720

Step by Step Solution

1. Step 1: Write the proportion equation
   1,294,656 : 2,640,720 = 2,640,720 : x
2. Step 2: Convert to fraction form
   1,294,656/2,640,720 = 2,640,720/x
3. Step 3: Cross multiply
   1,294,656x = 2,640,720 × 2,640,720
4. Step 4: Simplify right side
   1,294,656x = 6,973,402,118,400
5. Step 5: Solve for x
   x = 6,973,402,118,400/1,294,656
6. Step 6: Final answer
   x = 5,386,297.30