Finding the Fourth Proportional to 131.23, 196.71 and 70.42

Step by Step Solution

1. Step 1: Write the proportion equation
   131.23 : 196.71 = 70.42 : x
2. Step 2: Convert to fraction form
   131.23/196.71 = 70.42/x
3. Step 3: Cross multiply
   131.23x = 196.71 × 70.42
4. Step 4: Simplify right side
   131.23x = 13,852.32
5. Step 5: Solve for x
   x = 13,852.32/131.23
6. Step 6: Final answer
   x = 105.56