Finding the Fourth Proportional to 196.69, 294.82 and 81.10

Step by Step Solution

1. Step 1: Write the proportion equation
   196.69 : 294.82 = 81.10 : x
2. Step 2: Convert to fraction form
   196.69/294.82 = 81.10/x
3. Step 3: Cross multiply
   196.69x = 294.82 × 81.10
4. Step 4: Simplify right side
   196.69x = 23,910.10
5. Step 5: Solve for x
   x = 23,910.10/196.69
6. Step 6: Final answer
   x = 121.56