Finding the Fourth Proportional to 404.72, 607.39 and 267.72

Step by Step Solution

1. Step 1: Write the proportion equation
   404.72 : 607.39 = 267.72 : x
2. Step 2: Convert to fraction form
   404.72/607.39 = 267.72/x
3. Step 3: Cross multiply
   404.72x = 607.39 × 267.72
4. Step 4: Simplify right side
   404.72x = 162,609.78
5. Step 5: Solve for x
   x = 162,609.78/404.72
6. Step 6: Final answer
   x = 401.78