Finding the Fourth Proportional to 3,550.89, 5,327.12 and 1,085.90

Step by Step Solution

1. Step 1: Write the proportion equation
   3,550.89 : 5,327.12 = 1,085.90 : x
2. Step 2: Convert to fraction form
   3,550.89/5,327.12 = 1,085.90/x
3. Step 3: Cross multiply
   3,550.89x = 5,327.12 × 1,085.90
4. Step 4: Simplify right side
   3,550.89x = 5,784,687.54
5. Step 5: Solve for x
   x = 5,784,687.54/3,550.89
6. Step 6: Final answer
   x = 1,629.08