Finding the Fourth Proportional to 144.71, 216.69 and 131.34

Step by Step Solution

1. Step 1: Write the proportion equation
   144.71 : 216.69 = 131.34 : x
2. Step 2: Convert to fraction form
   144.71/216.69 = 131.34/x
3. Step 3: Cross multiply
   144.71x = 216.69 × 131.34
4. Step 4: Simplify right side
   144.71x = 28,460.06
5. Step 5: Solve for x
   x = 28,460.06/144.71
6. Step 6: Final answer
   x = 196.67