No Start Cub Cadet rider LT1045

I wasn't mowiing, but pulling a small sprayer and spraying dandelions when mower just shut off. Now it won't crank or anythin! Turn the key while sitting on seat and depressing brake pedal and -- nothing! Need to finish spraying and need to mow again! Please help!!

If it just stopped dead and the ignitio switch does nothing and you hear no clicks, pops etc when you turn the key then the fues is blown or the battery is dead.
So wack the battery on your charger find the fuse and replace it.
If the fuse blows then you have a short. check the oil level if your engine has an oil swith that will turn off the engine and make sure the blade switch is off and brake on when you try again.
A freshly charged battery will run a mower without the blade running for weeks or about 4 hours with an electric PTO so a fuse & charged battey should at least allow you to finish the spraying