You want to buy equipment that is available from $2$ companies. The price of the equipment is the same for both companies. Silver

Media would let you make quarterly payments of $$4,260$ for $4$ years at an interest rate of $1\mathrm{.}30$ percent per quarter. Your first payment

to Silver Media would be in $3$ months. River Media would let you make monthly payments of $$1,866$ for $4$ years at an interest rate of $x$

percent per month. Your first payment to River Media would be today. What is $x?$