Valuation Question question, investment, following, finding

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From CFAI, Reading 41 (FCF Vauations), EOC Q11. In Part A, FCFE(4) = 918.19, calcuated by using the FCFE = NI - (1-DR)(Net investment in operating assets). Then using this FCFE(4), V3 is calculated as V3 = FCFE4/r-g, where g=8% for N.I grwoth rate is used. My question is why can't we use the same g=8% in the following

FCFE(4) = FCFE(3)(1+g) = 124.27(1.08) = 134.21 in finding the terminal value V3?, since we are using g=8% in terminal value formula, this should also be reflected in numerator?