Finding the Third Proportional to 1,221,036 and 2,685,678

Step by Step Solution

1. Step 1: Write the proportion equation
   1,221,036 : 2,685,678 = 2,685,678 : x
2. Step 2: Convert to fraction form
   1,221,036/2,685,678 = 2,685,678/x
3. Step 3: Cross multiply
   1,221,036x = 2,685,678 × 2,685,678
4. Step 4: Simplify right side
   1,221,036x = 7,212,866,319,684
5. Step 5: Solve for x
   x = 7,212,866,319,684/1,221,036
6. Step 6: Final answer
   x = 5,907,169.26