Finding the Third Proportional to 1,218,780 and 2,640,942

Step by Step Solution

1. Step 1: Write the proportion equation
   1,218,780 : 2,640,942 = 2,640,942 : x
2. Step 2: Convert to fraction form
   1,218,780/2,640,942 = 2,640,942/x
3. Step 3: Cross multiply
   1,218,780x = 2,640,942 × 2,640,942
4. Step 4: Simplify right side
   1,218,780x = 6,974,574,647,364
5. Step 5: Solve for x
   x = 6,974,574,647,364/1,218,780
6. Step 6: Final answer
   x = 5,722,587.05