Finding the Third Proportional to 1,218,705 and 2,640,804

Step by Step Solution

1. Step 1: Write the proportion equation
   1,218,705 : 2,640,804 = 2,640,804 : x
2. Step 2: Convert to fraction form
   1,218,705/2,640,804 = 2,640,804/x
3. Step 3: Cross multiply
   1,218,705x = 2,640,804 × 2,640,804
4. Step 4: Simplify right side
   1,218,705x = 6,973,845,766,416
5. Step 5: Solve for x
   x = 6,973,845,766,416/1,218,705
6. Step 6: Final answer
   x = 5,722,341.15