Finding the Fourth Proportional to 104.72, 144.90 and 91.82

Step by Step Solution

1. Step 1: Write the proportion equation
   104.72 : 144.90 = 91.82 : x
2. Step 2: Convert to fraction form
   104.72/144.90 = 91.82/x
3. Step 3: Cross multiply
   104.72x = 144.90 × 91.82
4. Step 4: Simplify right side
   104.72x = 13,304.72
5. Step 5: Solve for x
   x = 13,304.72/104.72
6. Step 6: Final answer
   x = 127.05