Finding the Fourth Proportional to 131.48, 196.84 and 99.12

Step by Step Solution

1. Step 1: Write the proportion equation
   131.48 : 196.84 = 99.12 : x
2. Step 2: Convert to fraction form
   131.48/196.84 = 99.12/x
3. Step 3: Cross multiply
   131.48x = 196.84 × 99.12
4. Step 4: Simplify right side
   131.48x = 19,510.17
5. Step 5: Solve for x
   x = 19,510.17/131.48
6. Step 6: Final answer
   x = 148.39