Finding the Fourth Proportional to 131.20, 196.72 and 59.12

Step by Step Solution

1. Step 1: Write the proportion equation
   131.20 : 196.72 = 59.12 : x
2. Step 2: Convert to fraction form
   131.20/196.72 = 59.12/x
3. Step 3: Cross multiply
   131.20x = 196.72 × 59.12
4. Step 4: Simplify right side
   131.20x = 11,630.09
5. Step 5: Solve for x
   x = 11,630.09/131.20
6. Step 6: Final answer
   x = 88.64