Finding the Fourth Proportional to 2,789.52, 4,185.06 and 1,058.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,789.52 : 4,185.06 = 1,058.28 : x
2. Step 2: Convert to fraction form
   2,789.52/4,185.06 = 1,058.28/x
3. Step 3: Cross multiply
   2,789.52x = 4,185.06 × 1,058.28
4. Step 4: Simplify right side
   2,789.52x = 4,428,965.30
5. Step 5: Solve for x
   x = 4,428,965.30/2,789.52
6. Step 6: Final answer
   x = 1,587.72