Finding the Fourth Proportional to 131.71, 196.62 and 104.38

Step by Step Solution

1. Step 1: Write the proportion equation
   131.71 : 196.62 = 104.38 : x
2. Step 2: Convert to fraction form
   131.71/196.62 = 104.38/x
3. Step 3: Cross multiply
   131.71x = 196.62 × 104.38
4. Step 4: Simplify right side
   131.71x = 20,523.20
5. Step 5: Solve for x
   x = 20,523.20/131.71
6. Step 6: Final answer
   x = 155.82