Finding the Fourth Proportional to 85,791.96, 128,630.43 and 33,139.94

Step by Step Solution

1. Step 1: Write the proportion equation
   85,791.96 : 128,630.43 = 33,139.94 : x
2. Step 2: Convert to fraction form
   85,791.96/128,630.43 = 33,139.94/x
3. Step 3: Cross multiply
   85,791.96x = 128,630.43 × 33,139.94
4. Step 4: Simplify right side
   85,791.96x = 4,262,804,089.22
5. Step 5: Solve for x
   x = 4,262,804,089.22/85,791.96
6. Step 6: Final answer
   x = 49,687.69