Finding the Fourth Proportional to 196.48, 294.50 and 128.03

Step by Step Solution

1. Step 1: Write the proportion equation
   196.48 : 294.50 = 128.03 : x
2. Step 2: Convert to fraction form
   196.48/294.50 = 128.03/x
3. Step 3: Cross multiply
   196.48x = 294.50 × 128.03
4. Step 4: Simplify right side
   196.48x = 37,705.89
5. Step 5: Solve for x
   x = 37,705.89/196.48
6. Step 6: Final answer
   x = 191.91