Finding the Fourth Proportional to 105.86, 158.37 and 92.91

Step by Step Solution

1. Step 1: Write the proportion equation
   105.86 : 158.37 = 92.91 : x
2. Step 2: Convert to fraction form
   105.86/158.37 = 92.91/x
3. Step 3: Cross multiply
   105.86x = 158.37 × 92.91
4. Step 4: Simplify right side
   105.86x = 14,714.16
5. Step 5: Solve for x
   x = 14,714.16/105.86
6. Step 6: Final answer
   x = 139.00