Finding the Fourth Proportional to 131.35, 196.99 and 70.42

Step by Step Solution

1. Step 1: Write the proportion equation
   131.35 : 196.99 = 70.42 : x
2. Step 2: Convert to fraction form
   131.35/196.99 = 70.42/x
3. Step 3: Cross multiply
   131.35x = 196.99 × 70.42
4. Step 4: Simplify right side
   131.35x = 13,872.04
5. Step 5: Solve for x
   x = 13,872.04/131.35
6. Step 6: Final answer
   x = 105.61