Finding the Fourth Proportional to 158.42, 237.89 and 131.42

Step by Step Solution

1. Step 1: Write the proportion equation
   158.42 : 237.89 = 131.42 : x
2. Step 2: Convert to fraction form
   158.42/237.89 = 131.42/x
3. Step 3: Cross multiply
   158.42x = 237.89 × 131.42
4. Step 4: Simplify right side
   158.42x = 31,264.43
5. Step 5: Solve for x
   x = 31,264.43/158.42
6. Step 6: Final answer
   x = 197.35