Finding the Fourth Proportional to 131.59, 196.96 and 121.98

Step by Step Solution

1. Step 1: Write the proportion equation
   131.59 : 196.96 = 121.98 : x
2. Step 2: Convert to fraction form
   131.59/196.96 = 121.98/x
3. Step 3: Cross multiply
   131.59x = 196.96 × 121.98
4. Step 4: Simplify right side
   131.59x = 24,025.18
5. Step 5: Solve for x
   x = 24,025.18/131.59
6. Step 6: Final answer
   x = 182.58