Finding the Fourth Proportional to 105.56, 158.28 and 50.69

Step by Step Solution

1. Step 1: Write the proportion equation
   105.56 : 158.28 = 50.69 : x
2. Step 2: Convert to fraction form
   105.56/158.28 = 50.69/x
3. Step 3: Cross multiply
   105.56x = 158.28 × 50.69
4. Step 4: Simplify right side
   105.56x = 8,022.42
5. Step 5: Solve for x
   x = 8,022.42/105.56
6. Step 6: Final answer
   x = 76.00