Finding the Fourth Proportional to 112.52, 155.25 and 68.28

Step by Step Solution

1. Step 1: Write the proportion equation
   112.52 : 155.25 = 68.28 : x
2. Step 2: Convert to fraction form
   112.52/155.25 = 68.28/x
3. Step 3: Cross multiply
   112.52x = 155.25 × 68.28
4. Step 4: Simplify right side
   112.52x = 10,599.89
5. Step 5: Solve for x
   x = 10,599.89/112.52
6. Step 6: Final answer
   x = 94.20