Finding the Fourth Proportional to 238.42, 328.83 and 164.72

Step by Step Solution

1. Step 1: Write the proportion equation
   238.42 : 328.83 = 164.72 : x
2. Step 2: Convert to fraction form
   238.42/328.83 = 164.72/x
3. Step 3: Cross multiply
   238.42x = 328.83 × 164.72
4. Step 4: Simplify right side
   238.42x = 54,164.88
5. Step 5: Solve for x
   x = 54,164.88/238.42
6. Step 6: Final answer
   x = 227.18