Finding the Fourth Proportional to 267.63, 401.57 and 105.31

Step by Step Solution

1. Step 1: Write the proportion equation
   267.63 : 401.57 = 105.31 : x
2. Step 2: Convert to fraction form
   267.63/401.57 = 105.31/x
3. Step 3: Cross multiply
   267.63x = 401.57 × 105.31
4. Step 4: Simplify right side
   267.63x = 42,289.34
5. Step 5: Solve for x
   x = 42,289.34/267.63
6. Step 6: Final answer
   x = 158.01