Finding the Fourth Proportional to 196.83, 271.58 and 157.57

Step by Step Solution

1. Step 1: Write the proportion equation
   196.83 : 271.58 = 157.57 : x
2. Step 2: Convert to fraction form
   196.83/271.58 = 157.57/x
3. Step 3: Cross multiply
   196.83x = 271.58 × 157.57
4. Step 4: Simplify right side
   196.83x = 42,791.39
5. Step 5: Solve for x
   x = 42,791.39/196.83
6. Step 6: Final answer
   x = 217.41