Finding the Fourth Proportional to 142.56, 196.50 and 98.82

Step by Step Solution

1. Step 1: Write the proportion equation
   142.56 : 196.50 = 98.82 : x
2. Step 2: Convert to fraction form
   142.56/196.50 = 98.82/x
3. Step 3: Cross multiply
   142.56x = 196.50 × 98.82
4. Step 4: Simplify right side
   142.56x = 19,418.13
5. Step 5: Solve for x
   x = 19,418.13/142.56
6. Step 6: Final answer
   x = 136.21