Finding the Fourth Proportional to 142.52, 196.49 and 98.87

Step by Step Solution

1. Step 1: Write the proportion equation
   142.52 : 196.49 = 98.87 : x
2. Step 2: Convert to fraction form
   142.52/196.49 = 98.87/x
3. Step 3: Cross multiply
   142.52x = 196.49 × 98.87
4. Step 4: Simplify right side
   142.52x = 19,426.23
5. Step 5: Solve for x
   x = 19,426.23/142.52
6. Step 6: Final answer
   x = 136.31