Finding the Fourth Proportional to 1,081.15, 1,617.61 and 594.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,081.15 : 1,617.61 = 594.55 : x
2. Step 2: Convert to fraction form
   1,081.15/1,617.61 = 594.55/x
3. Step 3: Cross multiply
   1,081.15x = 1,617.61 × 594.55
4. Step 4: Simplify right side
   1,081.15x = 961,738.96
5. Step 5: Solve for x
   x = 961,738.96/1,081.15
6. Step 6: Final answer
   x = 889.55