Finding the Fourth Proportional to 131.14, 196.71 and 99.10

Step by Step Solution

1. Step 1: Write the proportion equation
   131.14 : 196.71 = 99.10 : x
2. Step 2: Convert to fraction form
   131.14/196.71 = 99.10/x
3. Step 3: Cross multiply
   131.14x = 196.71 × 99.10
4. Step 4: Simplify right side
   131.14x = 19,493.96
5. Step 5: Solve for x
   x = 19,493.96/131.14
6. Step 6: Final answer
   x = 148.65