Finding the Fourth Proportional to 105.72, 158.22 and 73.50

Step by Step Solution

1. Step 1: Write the proportion equation
   105.72 : 158.22 = 73.50 : x
2. Step 2: Convert to fraction form
   105.72/158.22 = 73.50/x
3. Step 3: Cross multiply
   105.72x = 158.22 × 73.50
4. Step 4: Simplify right side
   105.72x = 11,629.17
5. Step 5: Solve for x
   x = 11,629.17/105.72
6. Step 6: Final answer
   x = 110.00