Finding the Fourth Proportional to 267.91, 401.71 and 105.42

Step by Step Solution

1. Step 1: Write the proportion equation
   267.91 : 401.71 = 105.42 : x
2. Step 2: Convert to fraction form
   267.91/401.71 = 105.42/x
3. Step 3: Cross multiply
   267.91x = 401.71 × 105.42
4. Step 4: Simplify right side
   267.91x = 42,348.27
5. Step 5: Solve for x
   x = 42,348.27/267.91
6. Step 6: Final answer
   x = 158.07