Finding the Fourth Proportional to 131.22, 196.83 and 115.86

Step by Step Solution

1. Step 1: Write the proportion equation
   131.22 : 196.83 = 115.86 : x
2. Step 2: Convert to fraction form
   131.22/196.83 = 115.86/x
3. Step 3: Cross multiply
   131.22x = 196.83 × 115.86
4. Step 4: Simplify right side
   131.22x = 22,804.72
5. Step 5: Solve for x
   x = 22,804.72/131.22
6. Step 6: Final answer
   x = 173.79