Finding the Fourth Proportional to 105.69, 158.53 and 37.21

Step by Step Solution

1. Step 1: Write the proportion equation
   105.69 : 158.53 = 37.21 : x
2. Step 2: Convert to fraction form
   105.69/158.53 = 37.21/x
3. Step 3: Cross multiply
   105.69x = 158.53 × 37.21
4. Step 4: Simplify right side
   105.69x = 5,898.25
5. Step 5: Solve for x
   x = 5,898.25/105.69
6. Step 6: Final answer
   x = 55.81