Finding the Third Proportional to 1,218,790 and 2,640,980

Step by Step Solution

1. Step 1: Write the proportion equation
   1,218,790 : 2,640,980 = 2,640,980 : x
2. Step 2: Convert to fraction form
   1,218,790/2,640,980 = 2,640,980/x
3. Step 3: Cross multiply
   1,218,790x = 2,640,980 × 2,640,980
4. Step 4: Simplify right side
   1,218,790x = 6,974,775,360,400
5. Step 5: Solve for x
   x = 6,974,775,360,400/1,218,790
6. Step 6: Final answer
   x = 5,722,704.78