To find three consecutive odd numbers that sum up to 63, let’s break down the problem step by step.

Define the Odd Numbers
Let’s denote the first odd number as \( x \). Since we are looking for consecutive odd numbers, we can express the other two numbers as:
- Second odd number: \( x + 2 \)
- Third odd number: \( x + 4 \)

Set Up the Equation
Now, we can set up the equation based on their sum:
- \( x + (x + 2) + (x + 4) = 63 \)

Simplify the Equation
Combine like terms:
- \( 3x + 6 = 63 \)

Isolate the Variable
To find \( x \), subtract 6 from both sides:
- \( 3x = 63 - 6 \)
- \( 3x = 57 \)
Now, divide both sides by 3:
- \( x = 19 \)

Identify the Consecutive Odd Numbers
Now that we have \( x \):
- First odd number: \( 19 \)
- Second odd number: \( 19 + 2 = 21 \)
- Third odd number: \( 19 + 4 = 23 \)

Conclusion
The three consecutive odd numbers that sum up to 63 are:
- 19
- 21
- 23
Thus, the answer is \( 19, 21, \) and \( 23 \).