Finding the Fourth Proportional to 134.32, 185.38 and 109.72

Step by Step Solution

1. Step 1: Write the proportion equation
   134.32 : 185.38 = 109.72 : x
2. Step 2: Convert to fraction form
   134.32/185.38 = 109.72/x
3. Step 3: Cross multiply
   134.32x = 185.38 × 109.72
4. Step 4: Simplify right side
   134.32x = 20,339.89
5. Step 5: Solve for x
   x = 20,339.89/134.32
6. Step 6: Final answer
   x = 151.43