Finding the Fourth Proportional to 196.32, 270.86 and 118.72

Step by Step Solution

1. Step 1: Write the proportion equation
   196.32 : 270.86 = 118.72 : x
2. Step 2: Convert to fraction form
   196.32/270.86 = 118.72/x
3. Step 3: Cross multiply
   196.32x = 270.86 × 118.72
4. Step 4: Simplify right side
   196.32x = 32,156.50
5. Step 5: Solve for x
   x = 32,156.50/196.32
6. Step 6: Final answer
   x = 163.80