Fill in the missing statement and reason of the proof below.
Given: triangle, A, C, E, \cong, triangle, B, C, E, .△ACE≅△BCE.
Prove: triangle, A, C, D, \cong, triangle, B, C, D△ACD≅△BCD.
Statement: AC = BC
Reason: Corresponding parts of congruent triangles are congruent (CPCTC).
Statement: ∠ACD = ∠BCD
Reason: Corresponding parts of congruent triangles are congruent (CPCTC).
Statement: AD = BD
Reason: Corresponding parts of congruent triangles are congruent (CPCTC).
Thus, triangle ACD is congruent to triangle BCD by side-angle-side congruence (SAS).