Finding the Fourth Proportional to 123.72, 185.22 and 114.72

Step by Step Solution

1. Step 1: Write the proportion equation
   123.72 : 185.22 = 114.72 : x
2. Step 2: Convert to fraction form
   123.72/185.22 = 114.72/x
3. Step 3: Cross multiply
   123.72x = 185.22 × 114.72
4. Step 4: Simplify right side
   123.72x = 21,248.44
5. Step 5: Solve for x
   x = 21,248.44/123.72
6. Step 6: Final answer
   x = 171.75