Finding the Third Proportional to 1,399,240 and 2,160,698

Step by Step Solution

1. Step 1: Write the proportion equation
   1,399,240 : 2,160,698 = 2,160,698 : x
2. Step 2: Convert to fraction form
   1,399,240/2,160,698 = 2,160,698/x
3. Step 3: Cross multiply
   1,399,240x = 2,160,698 × 2,160,698
4. Step 4: Simplify right side
   1,399,240x = 4,668,615,847,204
5. Step 5: Solve for x
   x = 4,668,615,847,204/1,399,240
6. Step 6: Final answer
   x = 3,336,536.87