Finding the Fourth Proportional to 196.21, 270.76 and 113.31

Step by Step Solution

1. Step 1: Write the proportion equation
   196.21 : 270.76 = 113.31 : x
2. Step 2: Convert to fraction form
   196.21/270.76 = 113.31/x
3. Step 3: Cross multiply
   196.21x = 270.76 × 113.31
4. Step 4: Simplify right side
   196.21x = 30,679.82
5. Step 5: Solve for x
   x = 30,679.82/196.21
6. Step 6: Final answer
   x = 156.36