Finding the Fourth Proportional to 89.43, 134.15 and 38.10

Step by Step Solution

1. Step 1: Write the proportion equation
   89.43 : 134.15 = 38.10 : x
2. Step 2: Convert to fraction form
   89.43/134.15 = 38.10/x
3. Step 3: Cross multiply
   89.43x = 134.15 × 38.10
4. Step 4: Simplify right side
   89.43x = 5,111.12
5. Step 5: Solve for x
   x = 5,111.12/89.43
6. Step 6: Final answer
   x = 57.15