Finding the Third Proportional to 645,744 and 1,317,768

Step by Step Solution

1. Step 1: Write the proportion equation
   645,744 : 1,317,768 = 1,317,768 : x
2. Step 2: Convert to fraction form
   645,744/1,317,768 = 1,317,768/x
3. Step 3: Cross multiply
   645,744x = 1,317,768 × 1,317,768
4. Step 4: Simplify right side
   645,744x = 1,736,512,501,824
5. Step 5: Solve for x
   x = 1,736,512,501,824/645,744
6. Step 6: Final answer
   x = 2,689,165.52