In C major they are;
I - ii7/first inversion (or ii six) - I/second inversion (or I six four) - V7 - I
OR (in chord symbols)
C - dm7/F- C/G - G7 - C
The second chord ii or dm7/F is a substitue for F or IV. The third chord I/secod inversion or C/G is known in "theory" as I six four chord (can't type it correctly), it is a tonic chord with a dominant function that sets up the actual V7 dominant chord for an extra strong cadence. This chord precedes the cadenzas in Mozart's and Beethoven's concerti, if you want to hear how it's typically used in actual music. The numbers "six" and "six four" refer to the intervalic distance between the chord tones in the inversions of the chords, as derived from figured bass and still used today in classical harmonic analysis. Hope this helps...