Finding the Fourth Proportional to 142.02, 196.02 and 100.53

Step by Step Solution

1. Step 1: Write the proportion equation
   142.02 : 196.02 = 100.53 : x
2. Step 2: Convert to fraction form
   142.02/196.02 = 100.53/x
3. Step 3: Cross multiply
   142.02x = 196.02 × 100.53
4. Step 4: Simplify right side
   142.02x = 19,705.89
5. Step 5: Solve for x
   x = 19,705.89/142.02
6. Step 6: Final answer
   x = 138.75