Finding the Fourth Proportional to 123.32, 185.63 and 112.55

Step by Step Solution

1. Step 1: Write the proportion equation
   123.32 : 185.63 = 112.55 : x
2. Step 2: Convert to fraction form
   123.32/185.63 = 112.55/x
3. Step 3: Cross multiply
   123.32x = 185.63 × 112.55
4. Step 4: Simplify right side
   123.32x = 20,891.17
5. Step 5: Solve for x
   x = 20,891.17/123.32
6. Step 6: Final answer
   x = 169.41