Finding the Fourth Proportional to 105.42, 145.55 and 94.49

Step by Step Solution

1. Step 1: Write the proportion equation
   105.42 : 145.55 = 94.49 : x
2. Step 2: Convert to fraction form
   105.42/145.55 = 94.49/x
3. Step 3: Cross multiply
   105.42x = 145.55 × 94.49
4. Step 4: Simplify right side
   105.42x = 13,751.82
5. Step 5: Solve for x
   x = 13,751.82/105.42
6. Step 6: Final answer
   x = 130.45