Finding the Third Proportional to 300,904 and 648,824

Step by Step Solution

1. Step 1: Write the proportion equation
   300,904 : 648,824 = 648,824 : x
2. Step 2: Convert to fraction form
   300,904/648,824 = 648,824/x
3. Step 3: Cross multiply
   300,904x = 648,824 × 648,824
4. Step 4: Simplify right side
   300,904x = 420,972,582,976
5. Step 5: Solve for x
   x = 420,972,582,976/300,904
6. Step 6: Final answer
   x = 1,399,026.21