To find the missing number, we can set up the equation based on the information given:
\[ 200,000,000 + 4,000,000 + x = 204,005,000 \]
First, simplify the left side by adding \(200,000,000\) and \(4,000,000\):
\[ 204,000,000 + x = 204,005,000 \]
Next, to isolate \(x\), subtract \(204,000,000\) from both sides:
\[ x = 204,005,000 - 204,000,000 \]
This gives us:
\[ x = 5,000 \]
Thus, the missing number is \(5,000\).