Finding the Fourth Proportional to 105.42, 158.01 and 51.24

Step by Step Solution

1. Step 1: Write the proportion equation
   105.42 : 158.01 = 51.24 : x
2. Step 2: Convert to fraction form
   105.42/158.01 = 51.24/x
3. Step 3: Cross multiply
   105.42x = 158.01 × 51.24
4. Step 4: Simplify right side
   105.42x = 8,096.43
5. Step 5: Solve for x
   x = 8,096.43/105.42
6. Step 6: Final answer
   x = 76.80