Finding the Fourth Proportional to 2,058.89, 3,087.65 and 671.85

Step by Step Solution

1. Step 1: Write the proportion equation
   2,058.89 : 3,087.65 = 671.85 : x
2. Step 2: Convert to fraction form
   2,058.89/3,087.65 = 671.85/x
3. Step 3: Cross multiply
   2,058.89x = 3,087.65 × 671.85
4. Step 4: Simplify right side
   2,058.89x = 2,074,434.29
5. Step 5: Solve for x
   x = 2,074,434.29/2,058.89
6. Step 6: Final answer
   x = 1,007.55