Finding the Third Proportional to 645,168 and 1,400,768

Step by Step Solution

1. Step 1: Write the proportion equation
   645,168 : 1,400,768 = 1,400,768 : x
2. Step 2: Convert to fraction form
   645,168/1,400,768 = 1,400,768/x
3. Step 3: Cross multiply
   645,168x = 1,400,768 × 1,400,768
4. Step 4: Simplify right side
   645,168x = 1,962,150,989,824
5. Step 5: Solve for x
   x = 1,962,150,989,824/645,168
6. Step 6: Final answer
   x = 3,041,302.40