Finding the Fourth Proportional to 158.72, 238.37 and 131.37

Step by Step Solution

1. Step 1: Write the proportion equation
   158.72 : 238.37 = 131.37 : x
2. Step 2: Convert to fraction form
   158.72/238.37 = 131.37/x
3. Step 3: Cross multiply
   158.72x = 238.37 × 131.37
4. Step 4: Simplify right side
   158.72x = 31,314.01
5. Step 5: Solve for x
   x = 31,314.01/158.72
6. Step 6: Final answer
   x = 197.30