Finding the Fourth Proportional to 196.50, 271.15 and 113.59

Step by Step Solution

1. Step 1: Write the proportion equation
   196.50 : 271.15 = 113.59 : x
2. Step 2: Convert to fraction form
   196.50/271.15 = 113.59/x
3. Step 3: Cross multiply
   196.50x = 271.15 × 113.59
4. Step 4: Simplify right side
   196.50x = 30,799.93
5. Step 5: Solve for x
   x = 30,799.93/196.50
6. Step 6: Final answer
   x = 156.74