Sell services to governmental agencies. Provide services and solve problems. Solve problems, provide services, or sell equipment. Proposals are sales presentations. Proposals may be written in response to RFPs.
Most proposals are internal.
Formal reports differ from formal proposals in length, organization, and serious tone. Like formal proposals, formal reports present ordered information to decision makers. In many ways formal reports can be thought of as long informational reports. Formal and informal reports most often include identical components. I would be glad to do follow-up research if required.