Finding the Fourth Proportional to 105.12, 144.72 and 94.86

Step by Step Solution

1. Step 1: Write the proportion equation
   105.12 : 144.72 = 94.86 : x
2. Step 2: Convert to fraction form
   105.12/144.72 = 94.86/x
3. Step 3: Cross multiply
   105.12x = 144.72 × 94.86
4. Step 4: Simplify right side
   105.12x = 13,728.14
5. Step 5: Solve for x
   x = 13,728.14/105.12
6. Step 6: Final answer
   x = 130.59