Finding the Fourth Proportional to 196.71, 294.94 and 105.18

Step by Step Solution

1. Step 1: Write the proportion equation
   196.71 : 294.94 = 105.18 : x
2. Step 2: Convert to fraction form
   196.71/294.94 = 105.18/x
3. Step 3: Cross multiply
   196.71x = 294.94 × 105.18
4. Step 4: Simplify right side
   196.71x = 31,021.79
5. Step 5: Solve for x
   x = 31,021.79/196.71
6. Step 6: Final answer
   x = 157.70