Finding the Fourth Proportional to 3,550.79, 5,326.71 and 1,085.29

Step by Step Solution

1. Step 1: Write the proportion equation
   3,550.79 : 5,326.71 = 1,085.29 : x
2. Step 2: Convert to fraction form
   3,550.79/5,326.71 = 1,085.29/x
3. Step 3: Cross multiply
   3,550.79x = 5,326.71 × 1,085.29
4. Step 4: Simplify right side
   3,550.79x = 5,781,025.10
5. Step 5: Solve for x
   x = 5,781,025.10/3,550.79
6. Step 6: Final answer
   x = 1,628.10