Finding the Fourth Proportional to 131.19, 196.88 and 69.42

Step by Step Solution

1. Step 1: Write the proportion equation
   131.19 : 196.88 = 69.42 : x
2. Step 2: Convert to fraction form
   131.19/196.88 = 69.42/x
3. Step 3: Cross multiply
   131.19x = 196.88 × 69.42
4. Step 4: Simplify right side
   131.19x = 13,667.06
5. Step 5: Solve for x
   x = 13,667.06/131.19
6. Step 6: Final answer
   x = 104.18