Finding the Third Proportional to 1,218,695 and 2,640,780

Step by Step Solution

1. Step 1: Write the proportion equation
   1,218,695 : 2,640,780 = 2,640,780 : x
2. Step 2: Convert to fraction form
   1,218,695/2,640,780 = 2,640,780/x
3. Step 3: Cross multiply
   1,218,695x = 2,640,780 × 2,640,780
4. Step 4: Simplify right side
   1,218,695x = 6,973,719,008,400
5. Step 5: Solve for x
   x = 6,973,719,008,400/1,218,695
6. Step 6: Final answer
   x = 5,722,284.09