Finding the Fourth Proportional to 315.05, 434.72 and 196.83

Step by Step Solution

1. Step 1: Write the proportion equation
   315.05 : 434.72 = 196.83 : x
2. Step 2: Convert to fraction form
   315.05/434.72 = 196.83/x
3. Step 3: Cross multiply
   315.05x = 434.72 × 196.83
4. Step 4: Simplify right side
   315.05x = 85,566.43
5. Step 5: Solve for x
   x = 85,566.43/315.05
6. Step 6: Final answer
   x = 271.60