Finding the Fourth Proportional to 196.89, 271.62 and 113.99

Step by Step Solution

1. Step 1: Write the proportion equation
   196.89 : 271.62 = 113.99 : x
2. Step 2: Convert to fraction form
   196.89/271.62 = 113.99/x
3. Step 3: Cross multiply
   196.89x = 271.62 × 113.99
4. Step 4: Simplify right side
   196.89x = 30,960.61
5. Step 5: Solve for x
   x = 30,960.61/196.89
6. Step 6: Final answer
   x = 157.25