In Chapter 5, “you’ll apply what you learned about persuasive messages to a proposal, a communication designed to persuade a business decision maker to adopt a plan, approve a project, choose a product or service, or supply funding.”
A proposal needs to convince your audience that your idea or solution is feasible and will meet their needs. Depending on the proposal, you may also need to convince your audience that you are the right person to implement the solution. –Chapter 5 BCOMM text
Read the following article for more information on Writing Proposals.