Finding the Fourth Proportional to 196.71, 294.89 and 128.25

Step by Step Solution

1. Step 1: Write the proportion equation
   196.71 : 294.89 = 128.25 : x
2. Step 2: Convert to fraction form
   196.71/294.89 = 128.25/x
3. Step 3: Cross multiply
   196.71x = 294.89 × 128.25
4. Step 4: Simplify right side
   196.71x = 37,819.00
5. Step 5: Solve for x
   x = 37,819.00/196.71
6. Step 6: Final answer
   x = 192.26