Finding the Fourth Proportional to 279.72, 385.83 and 196.83

Step by Step Solution

1. Step 1: Write the proportion equation
   279.72 : 385.83 = 196.83 : x
2. Step 2: Convert to fraction form
   279.72/385.83 = 196.83/x
3. Step 3: Cross multiply
   279.72x = 385.83 × 196.83
4. Step 4: Simplify right side
   279.72x = 75,942.92
5. Step 5: Solve for x
   x = 75,942.92/279.72
6. Step 6: Final answer
   x = 271.50