Finding the Fourth Proportional to 105.28, 158.72 and 100.08

Step by Step Solution

1. Step 1: Write the proportion equation
   105.28 : 158.72 = 100.08 : x
2. Step 2: Convert to fraction form
   105.28/158.72 = 100.08/x
3. Step 3: Cross multiply
   105.28x = 158.72 × 100.08
4. Step 4: Simplify right side
   105.28x = 15,884.70
5. Step 5: Solve for x
   x = 15,884.70/105.28
6. Step 6: Final answer
   x = 150.88