Finding the Third Proportional to 344,644 and 744,648

Step by Step Solution

1. Step 1: Write the proportion equation
   344,644 : 744,648 = 744,648 : x
2. Step 2: Convert to fraction form
   344,644/744,648 = 744,648/x
3. Step 3: Cross multiply
   344,644x = 744,648 × 744,648
4. Step 4: Simplify right side
   344,644x = 554,500,643,904
5. Step 5: Solve for x
   x = 554,500,643,904/344,644
6. Step 6: Final answer
   x = 1,608,908.45