Finding the Fourth Proportional to 2,058.78, 3,089.37 and 888.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,058.78 : 3,089.37 = 888.72 : x
2. Step 2: Convert to fraction form
   2,058.78/3,089.37 = 888.72/x
3. Step 3: Cross multiply
   2,058.78x = 3,089.37 × 888.72
4. Step 4: Simplify right side
   2,058.78x = 2,745,584.91
5. Step 5: Solve for x
   x = 2,745,584.91/2,058.78
6. Step 6: Final answer
   x = 1,333.60