Finding the Fourth Proportional to 1,058.94, 1,585.98 and 885.60

Step by Step Solution

1. Step 1: Write the proportion equation
   1,058.94 : 1,585.98 = 885.60 : x
2. Step 2: Convert to fraction form
   1,058.94/1,585.98 = 885.60/x
3. Step 3: Cross multiply
   1,058.94x = 1,585.98 × 885.60
4. Step 4: Simplify right side
   1,058.94x = 1,404,543.89
5. Step 5: Solve for x
   x = 1,404,543.89/1,058.94
6. Step 6: Final answer
   x = 1,326.37