Finding the Fourth Proportional to 103.69, 142.69 and 76.02

Step by Step Solution

1. Step 1: Write the proportion equation
   103.69 : 142.69 = 76.02 : x
2. Step 2: Convert to fraction form
   103.69/142.69 = 76.02/x
3. Step 3: Cross multiply
   103.69x = 142.69 × 76.02
4. Step 4: Simplify right side
   103.69x = 10,847.29
5. Step 5: Solve for x
   x = 10,847.29/103.69
6. Step 6: Final answer
   x = 104.61