Finding the Fourth Proportional to 105.65, 158.37 and 59.31

Step by Step Solution

1. Step 1: Write the proportion equation
   105.65 : 158.37 = 59.31 : x
2. Step 2: Convert to fraction form
   105.65/158.37 = 59.31/x
3. Step 3: Cross multiply
   105.65x = 158.37 × 59.31
4. Step 4: Simplify right side
   105.65x = 9,392.92
5. Step 5: Solve for x
   x = 9,392.92/105.65
6. Step 6: Final answer
   x = 88.91