Does the Candle item work with It Is Meant To Be?
No, you cannot.

Candle says:


  If you draw an event card, roll 1 additional die (maximum of 8 dice) for that event's trait rolls.


(Emphasis mine)

It Is Meant To Be says:


  You can choose instead to roll 4 dice and write down the result. [...]


The dice rolling for It Is Meant To Be is not a "trait roll".

A trait roll is one where you are rolling a number of dice equal to one of your traits (Speed, Might, Sanity, or Knowledge). "Roll 4 dice" is not making a trait roll.

From the rules:


  Sometimes a card or room
  tile tells you to attempt
  a roll based on one of
  your explorer’s traits
  (Speed, Might, Sanity, or
  Knowledge). When that
  happens, roll as many dice
  as your explorer currently
  has in that trait. For
  example, if your explorer
  must attempt a Sanity roll,
  and she currently has a
  Sanity of 4, roll 4 dice and
  add the dots together to
  get the result. Whether you
  succeed or fail, the card or
  tile will tell you the results
  of your attempt.


This rule does not specifically define "trait roll", but it strongly implies that "trait roll" is either "sanity roll", "might roll", "speed roll", or "knowledge roll"; because it defines a "trait" as one of those 4 things.