Finding the Third Proportional to 646,298 and 1,388,548

Step by Step Solution

1. Step 1: Write the proportion equation
   646,298 : 1,388,548 = 1,388,548 : x
2. Step 2: Convert to fraction form
   646,298/1,388,548 = 1,388,548/x
3. Step 3: Cross multiply
   646,298x = 1,388,548 × 1,388,548
4. Step 4: Simplify right side
   646,298x = 1,928,065,548,304
5. Step 5: Solve for x
   x = 1,928,065,548,304/646,298
6. Step 6: Final answer
   x = 2,983,245.42