a bond has a $1000 par value and a contract or coupon interest rate of 10.7%. The bonds have a current market value of $1, 123 and will mature in 10 years. The firms marginal tax rate is 34%.

I would solve for par value by noting that the given info states "a bond has a $1,000 par value."

Perhaps you needed to solve for a different variable (the bond's yield or IRR, say)? If so, post back in---with your attempts at arriving at the solution, natch---and a little bit o' guidance will be forthcoming.

Memorize the sequence of events: You show your work → You receive help. Perusal of other homework posts reveals a consistent truth: Questions that don't include a display of some effort get less attention than a No Spitting sign in a baseball dugout.