Finding the Fourth Proportional to 131.76, 196.61 and 117.07

Step by Step Solution

1. Step 1: Write the proportion equation
   131.76 : 196.61 = 117.07 : x
2. Step 2: Convert to fraction form
   131.76/196.61 = 117.07/x
3. Step 3: Cross multiply
   131.76x = 196.61 × 117.07
4. Step 4: Simplify right side
   131.76x = 23,016.06
5. Step 5: Solve for x
   x = 23,016.06/131.76
6. Step 6: Final answer
   x = 174.68