Finding the Fourth Proportional to 2,171.23, 3,255.56 and 1,058.47

Step by Step Solution

1. Step 1: Write the proportion equation
   2,171.23 : 3,255.56 = 1,058.47 : x
2. Step 2: Convert to fraction form
   2,171.23/3,255.56 = 1,058.47/x
3. Step 3: Cross multiply
   2,171.23x = 3,255.56 × 1,058.47
4. Step 4: Simplify right side
   2,171.23x = 3,445,891.02
5. Step 5: Solve for x
   x = 3,445,891.02/2,171.23
6. Step 6: Final answer
   x = 1,587.07