Step 1: Ascertain seating order.
- P is to the right of Q, implying Q is to the left of P.
- T is to the left of R and to the right of P, indicating T is positioned between P and R.
- Q is to the right of S, meaning S is to the left of Q.
The resultant arrangement from left to right is:
\[
S, Q, P, T, R.
\]
Step 2: Locate the central individual.
The individual occupying the middle position in this arrangement is \( \boxed{R} \).
Final Answer: \[ \boxed{R} \]