Back to the crux; if I am not missing something, the initial thread stated that the Amazon State had estimated its revenues at R$ 871,416,000.    

     To its surprise, it had the help of rubber revenues; so it  was 18.069:162$372, that in today currency would be:

      18.069:162$372  / 1:000$000  =  [Same as 18,069,372   /   1,000 = 18,069.37]

       18,069.37 x R$ 56,000 = R$ 1,011,884,720  (after  retified to today´s currency)

"Rubber provided 82.11 percent of that income."

then R$ 1,011,884,720  x 0,8211 =  R$   830,858,543.60

     They estimated that there were 175,800 people employed in the rubber activity at the time.  ==>
http://books.google.com/books?id=G6O1wbp3Yx8C&pg=PA29&lpg=PA29&dq=Amazon+1910+population&source=bl&ots=s6N9jqPkqp&sig=6AfgAL3LvMHQegUU4Oy_0wYaMYs&hl=en&ei=ZmPoTeOoD-Hr0gHIpMzIAQ&sa=X&oi=book_result&ct=result&resnum=8&ved=0CE8Q6AEwBw#v=onepage&q=Amazon%201910%20population&f=false

     A ballpoint figure would be then R$   830,858,543.60/175,800 =  R$ 4,726.16 per worker, that entered into the economy (I am not talking about their wages, but this give some idea here, anyway it would add some four thousands of Reais per head).