To better assist you with the problem involving tension and horizontal reaction being a three-digit number, could you provide more context or details, such as:

1. The type of problem (e.g., a pulley system, inclined plane, etc.)
2. Any known values like angles, masses, or forces
3. The system being analyzed (e.g., static equilibrium, dynamics)
4. A diagram, if available
5. Relevant equations or relationships in the problem

Once I have that, I can guide you through solving for tension and horizontal reaction, explaining each step.

Do you want to upload any additional details or ask any questions about this?