Finding the Fourth Proportional to 105.30, 144.72 and 94.50

Step by Step Solution

1. Step 1: Write the proportion equation
   105.30 : 144.72 = 94.50 : x
2. Step 2: Convert to fraction form
   105.30/144.72 = 94.50/x
3. Step 3: Cross multiply
   105.30x = 144.72 × 94.50
4. Step 4: Simplify right side
   105.30x = 13,676.04
5. Step 5: Solve for x
   x = 13,676.04/105.30
6. Step 6: Final answer
   x = 129.88