x1=-226.11;

y1=238.802;

z1=-1577;

x2=223.1317;

y2=201.5533;

z2=-1577;

x3=-277.2719;

y3=-202.0605;

z3=-1577;

syms t1 t2 t3

eq1=(t1*x1-t2*x2)^2+(t1*y1-t2*y2)^2+(t1*z1-t2*z2)^2-532.8689^2;

eq2=(t1*x1-t3*x3)^2+(t1*y1-t3*y3)^2+(t1*z1-t3*z3)^2-532.8689^2;

eq3=(t3*x3-t2*x2)^2+(t3*y3-t2*y2)^2+(t3*z3-t2*z2)^2-753.5904^2;

[t1 t2 t3]=solve(eq1,eq2,eq3,"t1","t2","t3")

樓主我用solve可以解出解來，你參考一下