Finding the Fourth Proportional to 104.72, 144.12 and 75.56

Step by Step Solution

1. Step 1: Write the proportion equation
   104.72 : 144.12 = 75.56 : x
2. Step 2: Convert to fraction form
   104.72/144.12 = 75.56/x
3. Step 3: Cross multiply
   104.72x = 144.12 × 75.56
4. Step 4: Simplify right side
   104.72x = 10,889.71
5. Step 5: Solve for x
   x = 10,889.71/104.72
6. Step 6: Final answer
   x = 103.99