Finding the Fourth Proportional to 112.52, 168.55 and 82.25

Step by Step Solution

1. Step 1: Write the proportion equation
   112.52 : 168.55 = 82.25 : x
2. Step 2: Convert to fraction form
   112.52/168.55 = 82.25/x
3. Step 3: Cross multiply
   112.52x = 168.55 × 82.25
4. Step 4: Simplify right side
   112.52x = 13,862.82
5. Step 5: Solve for x
   x = 13,862.82/112.52
6. Step 6: Final answer
   x = 123.20