The formula reads, molarity of first solution times volume of first solution equals molarity of second solution times volume of second solution. This is written as M1 * V1 = M2 * V2.
V1 = 4.29ml and M1 = 0.806. Also V2 = 100ml and M2 = ?
So we have 4.29 * 0.806 = 100 * M2
M2 = (4.29 * 0.806)/100
M2 = 3.45774/100 = 0.0345774
So M2 to 4 d.p = 0.0346