Finding the Fourth Proportional to 142.71, 196.83 and 103.52

Step by Step Solution

1. Step 1: Write the proportion equation
   142.71 : 196.83 = 103.52 : x
2. Step 2: Convert to fraction form
   142.71/196.83 = 103.52/x
3. Step 3: Cross multiply
   142.71x = 196.83 × 103.52
4. Step 4: Simplify right side
   142.71x = 20,374.86
5. Step 5: Solve for x
   x = 20,374.86/142.71
6. Step 6: Final answer
   x = 142.77