Finding the Fourth Proportional to 196.50, 294.45 and 128.01

Step by Step Solution

1. Step 1: Write the proportion equation
   196.50 : 294.45 = 128.01 : x
2. Step 2: Convert to fraction form
   196.50/294.45 = 128.01/x
3. Step 3: Cross multiply
   196.50x = 294.45 × 128.01
4. Step 4: Simplify right side
   196.50x = 37,692.54
5. Step 5: Solve for x
   x = 37,692.54/196.50
6. Step 6: Final answer
   x = 191.82