Finding the Fourth Proportional to 216.42, 298.61 and 196.25

Step by Step Solution

1. Step 1: Write the proportion equation
   216.42 : 298.61 = 196.25 : x
2. Step 2: Convert to fraction form
   216.42/298.61 = 196.25/x
3. Step 3: Cross multiply
   216.42x = 298.61 × 196.25
4. Step 4: Simplify right side
   216.42x = 58,603.45
5. Step 5: Solve for x
   x = 58,603.45/216.42
6. Step 6: Final answer
   x = 270.79