Finding the Third Proportional to 1,218,708 and 2,640,807

Step by Step Solution

1. Step 1: Write the proportion equation
   1,218,708 : 2,640,807 = 2,640,807 : x
2. Step 2: Convert to fraction form
   1,218,708/2,640,807 = 2,640,807/x
3. Step 3: Cross multiply
   1,218,708x = 2,640,807 × 2,640,807
4. Step 4: Simplify right side
   1,218,708x = 6,973,861,611,249
5. Step 5: Solve for x
   x = 6,973,861,611,249/1,218,708
6. Step 6: Final answer
   x = 5,722,340.06