Finding the Third Proportional to 1,221,040 and 2,685,686

Step by Step Solution

1. Step 1: Write the proportion equation
   1,221,040 : 2,685,686 = 2,685,686 : x
2. Step 2: Convert to fraction form
   1,221,040/2,685,686 = 2,685,686/x
3. Step 3: Cross multiply
   1,221,040x = 2,685,686 × 2,685,686
4. Step 4: Simplify right side
   1,221,040x = 7,212,909,290,596
5. Step 5: Solve for x
   x = 7,212,909,290,596/1,221,040
6. Step 6: Final answer
   x = 5,907,185.10