Finding the Fourth Proportional to 131.56, 196.98 and 105.92

Step by Step Solution

1. Step 1: Write the proportion equation
   131.56 : 196.98 = 105.92 : x
2. Step 2: Convert to fraction form
   131.56/196.98 = 105.92/x
3. Step 3: Cross multiply
   131.56x = 196.98 × 105.92
4. Step 4: Simplify right side
   131.56x = 20,864.12
5. Step 5: Solve for x
   x = 20,864.12/131.56
6. Step 6: Final answer
   x = 158.59