Finding the Fourth Proportional to 131.51, 196.34 and 108.72

Step by Step Solution

1. Step 1: Write the proportion equation
   131.51 : 196.34 = 108.72 : x
2. Step 2: Convert to fraction form
   131.51/196.34 = 108.72/x
3. Step 3: Cross multiply
   131.51x = 196.34 × 108.72
4. Step 4: Simplify right side
   131.51x = 21,345.54
5. Step 5: Solve for x
   x = 21,345.54/131.51
6. Step 6: Final answer
   x = 162.32