Now you may be thinking: Uh_oh, I've written business letters, but I've never written a business proposal. Don't fret! Proposal writing is simpler than you think. Basically, you need to introduce yourself, explain what you're proposing and why, describe any costs involved, and convince that boss or prospective client that you can be trusted to fulfill the promises you make. You can find lots of advice on the Internet and in special proposal writing packages like Proposal Kit. Starting with a proposal product like this can speed up the process by giving you pre_designed templates and lots of samples you can learn from to create your own winning proposal.
Then, deliver your polished proposal. Save it in a PDF file or print it out, or both. The best delivery method for you depends on your relationship with the party who will receive your proposal. It's common to attach PDF files to email these days, but for your situation, it might be most impressive to hand_deliver a nicely printed and signed proposal.