Finding the Fourth Proportional to 131.34, 196.88 and 79.82

Step by Step Solution

1. Step 1: Write the proportion equation
   131.34 : 196.88 = 79.82 : x
2. Step 2: Convert to fraction form
   131.34/196.88 = 79.82/x
3. Step 3: Cross multiply
   131.34x = 196.88 × 79.82
4. Step 4: Simplify right side
   131.34x = 15,714.96
5. Step 5: Solve for x
   x = 15,714.96/131.34
6. Step 6: Final answer
   x = 119.65