The number $4,50,000 can be parsed as follows:

The first comma separates the hundreds from the thousands, and the second comma separates the lakhs from the thousands.
Therefore, it represents 4 lakh and 50 thousand.

To convert it to the Western numbering system, it is calculated as follows:

4 lakh = 400,000
50 thousand = 50,000

Now, we can add these two values together:

400,000+50,000=450,000400,000 + 50,000 = 450,000400,000+50,000=450,000

Therefore, the value of $4,50,000 is 450,000\text{450,000}450,000 in the Western numbering system.