Finding the Fourth Proportional to 1,078.89, 1,617.93 and 591.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,078.89 : 1,617.93 = 591.27 : x
2. Step 2: Convert to fraction form
   1,078.89/1,617.93 = 591.27/x
3. Step 3: Cross multiply
   1,078.89x = 1,617.93 × 591.27
4. Step 4: Simplify right side
   1,078.89x = 956,633.47
5. Step 5: Solve for x
   x = 956,633.47/1,078.89
6. Step 6: Final answer
   x = 886.68