As shown in the fig., in an experiment to determine Young’s modulus of a wire, the extension-load curve is plotted. The curve is a straight line passing through the origin and makes an angle of 45^o with the load axis.

The length of wire is 62.8 cm and its diameter is 4mm. The Young’s modulus is found to be $x\times {10}^4{\mathrm{Nm}}^{-2}$. The value of ‘x’ is ________