Finding the Fourth Proportional to 42,791.31, 59,033.91 and 28,648.71

Step by Step Solution

1. Step 1: Write the proportion equation
   42,791.31 : 59,033.91 = 28,648.71 : x
2. Step 2: Convert to fraction form
   42,791.31/59,033.91 = 28,648.71/x
3. Step 3: Cross multiply
   42,791.31x = 59,033.91 × 28,648.71
4. Step 4: Simplify right side
   42,791.31x = 1,691,245,367.76
5. Step 5: Solve for x
   x = 1,691,245,367.76/42,791.31
6. Step 6: Final answer
   x = 39,523.10