Finding the Fourth Proportional to 238.42, 328.56 and 196.69

Step by Step Solution

1. Step 1: Write the proportion equation
   238.42 : 328.56 = 196.69 : x
2. Step 2: Convert to fraction form
   238.42/328.56 = 196.69/x
3. Step 3: Cross multiply
   238.42x = 328.56 × 196.69
4. Step 4: Simplify right side
   238.42x = 64,624.47
5. Step 5: Solve for x
   x = 64,624.47/238.42
6. Step 6: Final answer
   x = 271.05