To solve the expression \(6.123 \times 10^7 - 4,973,817\) and express the result in the form \(X \times 10^7\), we start by rewriting \(4,973,817\) in terms of \(10^7\):
\[ 4,973,817 = 0.4973817 \times 10^7 \]
Now we can subtract:
\[ 6.123 \times 10^7 - 0.4973817 \times 10^7 = (6.123 - 0.4973817) \times 10^7 \]
Calculating \(6.123 - 0.4973817\):
\[ 6.123 - 0.4973817 \approx 5.6256183 \]
Thus, we have:
\[ 6.123 \times 10^7 - 4,973,817 \approx 5.6256183 \times 10^7 \]
So, the final answer is:
\[ \approx 5.6256 \times 10^7 \quad (\text{rounded to four decimal places}) \]