Finding the Third Proportional to 300,906 and 648,828

Step by Step Solution

1. Step 1: Write the proportion equation
   300,906 : 648,828 = 648,828 : x
2. Step 2: Convert to fraction form
   300,906/648,828 = 648,828/x
3. Step 3: Cross multiply
   300,906x = 648,828 × 648,828
4. Step 4: Simplify right side
   300,906x = 420,977,773,584
5. Step 5: Solve for x
   x = 420,977,773,584/300,906
6. Step 6: Final answer
   x = 1,399,034.16