Finding the Third Proportional to 680,544 and 1,388,736

Step by Step Solution

1. Step 1: Write the proportion equation
   680,544 : 1,388,736 = 1,388,736 : x
2. Step 2: Convert to fraction form
   680,544/1,388,736 = 1,388,736/x
3. Step 3: Cross multiply
   680,544x = 1,388,736 × 1,388,736
4. Step 4: Simplify right side
   680,544x = 1,928,587,677,696
5. Step 5: Solve for x
   x = 1,928,587,677,696/680,544
6. Step 6: Final answer
   x = 2,833,891.24