Finding the Fourth Proportional to 196.31, 270.91 and 113.42

Step by Step Solution

1. Step 1: Write the proportion equation
   196.31 : 270.91 = 113.42 : x
2. Step 2: Convert to fraction form
   196.31/270.91 = 113.42/x
3. Step 3: Cross multiply
   196.31x = 270.91 × 113.42
4. Step 4: Simplify right side
   196.31x = 30,726.61
5. Step 5: Solve for x
   x = 30,726.61/196.31
6. Step 6: Final answer
   x = 156.52