Finding the Fourth Proportional to 131.76, 196.60 and 131.00

Step by Step Solution

1. Step 1: Write the proportion equation
   131.76 : 196.60 = 131.00 : x
2. Step 2: Convert to fraction form
   131.76/196.60 = 131.00/x
3. Step 3: Cross multiply
   131.76x = 196.60 × 131.00
4. Step 4: Simplify right side
   131.76x = 25,752.96
5. Step 5: Solve for x
   x = 25,752.96/131.76
6. Step 6: Final answer
   x = 195.46