Finding the Fourth Proportional to 142.50, 196.47 and 93.39

Step by Step Solution

1. Step 1: Write the proportion equation
   142.50 : 196.47 = 93.39 : x
2. Step 2: Convert to fraction form
   142.50/196.47 = 93.39/x
3. Step 3: Cross multiply
   142.50x = 196.47 × 93.39
4. Step 4: Simplify right side
   142.50x = 18,348.33
5. Step 5: Solve for x
   x = 18,348.33/142.50
6. Step 6: Final answer
   x = 128.76