Finding the Fourth Proportional to 105.62, 158.02 and 100.82

Step by Step Solution

1. Step 1: Write the proportion equation
   105.62 : 158.02 = 100.82 : x
2. Step 2: Convert to fraction form
   105.62/158.02 = 100.82/x
3. Step 3: Cross multiply
   105.62x = 158.02 × 100.82
4. Step 4: Simplify right side
   105.62x = 15,931.72
5. Step 5: Solve for x
   x = 15,931.72/105.62
6. Step 6: Final answer
   x = 150.85