Finding the Fourth Proportional to 196.43, 294.37 and 145.09

Step by Step Solution

1. Step 1: Write the proportion equation
   196.43 : 294.37 = 145.09 : x
2. Step 2: Convert to fraction form
   196.43/294.37 = 145.09/x
3. Step 3: Cross multiply
   196.43x = 294.37 × 145.09
4. Step 4: Simplify right side
   196.43x = 42,710.15
5. Step 5: Solve for x
   x = 42,710.15/196.43
6. Step 6: Final answer
   x = 217.44