Finding the Fourth Proportional to 196.86, 294.71 and 145.73

Step by Step Solution

1. Step 1: Write the proportion equation
   196.86 : 294.71 = 145.73 : x
2. Step 2: Convert to fraction form
   196.86/294.71 = 145.73/x
3. Step 3: Cross multiply
   196.86x = 294.71 × 145.73
4. Step 4: Simplify right side
   196.86x = 42,948.09
5. Step 5: Solve for x
   x = 42,948.09/196.86
6. Step 6: Final answer
   x = 218.17