Finding the Fourth Proportional to 105.58, 145.56 and 94.78

Step by Step Solution

1. Step 1: Write the proportion equation
   105.58 : 145.56 = 94.78 : x
2. Step 2: Convert to fraction form
   105.58/145.56 = 94.78/x
3. Step 3: Cross multiply
   105.58x = 145.56 × 94.78
4. Step 4: Simplify right side
   105.58x = 13,796.18
5. Step 5: Solve for x
   x = 13,796.18/105.58
6. Step 6: Final answer
   x = 130.67