Finding the Fourth Proportional to 3,550.53, 5,326.44 and 1,085.31

Step by Step Solution

1. Step 1: Write the proportion equation
   3,550.53 : 5,326.44 = 1,085.31 : x
2. Step 2: Convert to fraction form
   3,550.53/5,326.44 = 1,085.31/x
3. Step 3: Cross multiply
   3,550.53x = 5,326.44 × 1,085.31
4. Step 4: Simplify right side
   3,550.53x = 5,780,838.60
5. Step 5: Solve for x
   x = 5,780,838.60/3,550.53
6. Step 6: Final answer
   x = 1,628.16