Finding the Fourth Proportional to 105.36, 158.03 and 71.34

Step by Step Solution

1. Step 1: Write the proportion equation
   105.36 : 158.03 = 71.34 : x
2. Step 2: Convert to fraction form
   105.36/158.03 = 71.34/x
3. Step 3: Cross multiply
   105.36x = 158.03 × 71.34
4. Step 4: Simplify right side
   105.36x = 11,273.86
5. Step 5: Solve for x
   x = 11,273.86/105.36
6. Step 6: Final answer
   x = 107.00