Finding the Fourth Proportional to 144.52, 215.69 and 143.32

Step by Step Solution

1. Step 1: Write the proportion equation
   144.52 : 215.69 = 143.32 : x
2. Step 2: Convert to fraction form
   144.52/215.69 = 143.32/x
3. Step 3: Cross multiply
   144.52x = 215.69 × 143.32
4. Step 4: Simplify right side
   144.52x = 30,912.69
5. Step 5: Solve for x
   x = 30,912.69/144.52
6. Step 6: Final answer
   x = 213.90