Guide them through how you are going to solve their problem. Once you've reiterated their pain, show them how you are going to relieve them of that pain. This does not mean that you should start spouting off the tools that you are going to use. Rather, you should be outline the results your client will see when working with you. Show them how you are going to meet their goals and expectations. Explain to them what metrics you will use to determine success. Let them know that you have their best interest in mind and that you know what you are doing. Now, you'll notice that there is no mention of price. That's because price doesn't matter. What truly matters to a prospect is the value that you offer and the relationship that you have built.
Before you read anything else, the first thing that you need to understand is that proposals can be a huge waste of time for you and for your prospect. If they are not created the right way, and if the proper foundation hasn't been built, then you'll be spinning your wheels. Most proposals have a 25% win rate. If done right, your rate should jump to 60% _ 80%.