Finding the Fourth Proportional to 142.65, 196.76 and 109.98

Step by Step Solution

1. Step 1: Write the proportion equation
   142.65 : 196.76 = 109.98 : x
2. Step 2: Convert to fraction form
   142.65/196.76 = 109.98/x
3. Step 3: Cross multiply
   142.65x = 196.76 × 109.98
4. Step 4: Simplify right side
   142.65x = 21,639.94
5. Step 5: Solve for x
   x = 21,639.94/142.65
6. Step 6: Final answer
   x = 151.70