Finding the Fourth Proportional to 267.47, 401.34 and 105.15

Step by Step Solution

1. Step 1: Write the proportion equation
   267.47 : 401.34 = 105.15 : x
2. Step 2: Convert to fraction form
   267.47/401.34 = 105.15/x
3. Step 3: Cross multiply
   267.47x = 401.34 × 105.15
4. Step 4: Simplify right side
   267.47x = 42,200.90
5. Step 5: Solve for x
   x = 42,200.90/267.47
6. Step 6: Final answer
   x = 157.78