Solve : 105.27% of 1200.11 + 11.80% of 2360.85 = 21.99% of (?) + 1420.99

Answer: Option D

105.27% of 1200.11 + 11.80% of 2360.85 = 21.99% of (?) + 1420.99
⇒ 105% of 1200 + 12% of 2360 = 22% of (?) + 1421
⇒ $$\frac{105\times 1200}{100}+\frac{12\times 2360}{100}=$$     $$\frac{22\times (?)}{100}$$   $$+1421$$
$$\Rightarrow \frac{22\times (?)}{100}=1260+283.30$$       $$-1421$$
$$\begin{array}{rl}& \Rightarrow \frac{22\times (?)}{100}=1543-1421\\ & \Rightarrow \frac{22\times (?)}{100}=122\\ & \therefore (?)=\frac{122\times 100}{22}\\ & \Rightarrow (?)=\frac{122\times 50}{11}\\ & \Rightarrow (?)=554.5(approximate550)\end{array}$$