Finding the Third Proportional to 300,920 and 648,848

Step by Step Solution

1. Step 1: Write the proportion equation
   300,920 : 648,848 = 648,848 : x
2. Step 2: Convert to fraction form
   300,920/648,848 = 648,848/x
3. Step 3: Cross multiply
   300,920x = 648,848 × 648,848
4. Step 4: Simplify right side
   300,920x = 421,003,727,104
5. Step 5: Solve for x
   x = 421,003,727,104/300,920
6. Step 6: Final answer
   x = 1,399,055.32