Finding the Fourth Proportional to 105.94, 158.91 and 57.82

Step by Step Solution

1. Step 1: Write the proportion equation
   105.94 : 158.91 = 57.82 : x
2. Step 2: Convert to fraction form
   105.94/158.91 = 57.82/x
3. Step 3: Cross multiply
   105.94x = 158.91 × 57.82
4. Step 4: Simplify right side
   105.94x = 9,188.18
5. Step 5: Solve for x
   x = 9,188.18/105.94
6. Step 6: Final answer
   x = 86.73