Finding the Fourth Proportional to 105.50, 158.24 and 51.38

Step by Step Solution

1. Step 1: Write the proportion equation
   105.50 : 158.24 = 51.38 : x
2. Step 2: Convert to fraction form
   105.50/158.24 = 51.38/x
3. Step 3: Cross multiply
   105.50x = 158.24 × 51.38
4. Step 4: Simplify right side
   105.50x = 8,129.71
5. Step 5: Solve for x
   x = 8,129.71/105.50
6. Step 6: Final answer
   x = 77.06