Kittel 3350 2549 1,314240879
Cousin 3455 2457 1,406186406
Boeckmans 3469 2526 1,373317498
Tuft 3574 2284 1,564798599
Veelers 3720 2553 1,457109283
Bazayev 3559 2630 1,353231939
Muravyev 3636 2512 1,447452229
Hivert 3356 2562 1,30991413
So Kittel's time is 1,31 x first TT, Tuft's 1,56, Veelers somewhere in between.
Applying this formula ("first TT time x 1,30"), Froome could be doing 47:30, but I guess first TT time x 1,35 (49:30) is more realistic as both Hivert and Kittel clearly performed better now than during the first TT.