Finding the Third Proportional to 300,888 and 648,798

Step by Step Solution

1. Step 1: Write the proportion equation
   300,888 : 648,798 = 648,798 : x
2. Step 2: Convert to fraction form
   300,888/648,798 = 648,798/x
3. Step 3: Cross multiply
   300,888x = 648,798 × 648,798
4. Step 4: Simplify right side
   300,888x = 420,938,844,804
5. Step 5: Solve for x
   x = 420,938,844,804/300,888
6. Step 6: Final answer
   x = 1,398,988.48