Finding the Fourth Proportional to 131.18, 196.43 and 104.18

Step by Step Solution

1. Step 1: Write the proportion equation
   131.18 : 196.43 = 104.18 : x
2. Step 2: Convert to fraction form
   131.18/196.43 = 104.18/x
3. Step 3: Cross multiply
   131.18x = 196.43 × 104.18
4. Step 4: Simplify right side
   131.18x = 20,462.57
5. Step 5: Solve for x
   x = 20,462.57/131.18
6. Step 6: Final answer
   x = 155.99