Finding the Fourth Proportional to 142.04, 196.06 and 89.62

Step by Step Solution

1. Step 1: Write the proportion equation
   142.04 : 196.06 = 89.62 : x
2. Step 2: Convert to fraction form
   142.04/196.06 = 89.62/x
3. Step 3: Cross multiply
   142.04x = 196.06 × 89.62
4. Step 4: Simplify right side
   142.04x = 17,570.90
5. Step 5: Solve for x
   x = 17,570.90/142.04
6. Step 6: Final answer
   x = 123.70