Finding the Fourth Proportional to 105.89, 158.85 and 100.73

Step by Step Solution

1. Step 1: Write the proportion equation
   105.89 : 158.85 = 100.73 : x
2. Step 2: Convert to fraction form
   105.89/158.85 = 100.73/x
3. Step 3: Cross multiply
   105.89x = 158.85 × 100.73
4. Step 4: Simplify right side
   105.89x = 16,000.96
5. Step 5: Solve for x
   x = 16,000.96/105.89
6. Step 6: Final answer
   x = 151.11