Finding the Fourth Proportional to 131.56, 196.15 and 130.50

Step by Step Solution

1. Step 1: Write the proportion equation
   131.56 : 196.15 = 130.50 : x
2. Step 2: Convert to fraction form
   131.56/196.15 = 130.50/x
3. Step 3: Cross multiply
   131.56x = 196.15 × 130.50
4. Step 4: Simplify right side
   131.56x = 25,597.58
5. Step 5: Solve for x
   x = 25,597.58/131.56
6. Step 6: Final answer
   x = 194.57