Finding the Fourth Proportional to 105.58, 158.43 and 57.52

Step by Step Solution

1. Step 1: Write the proportion equation
   105.58 : 158.43 = 57.52 : x
2. Step 2: Convert to fraction form
   105.58/158.43 = 57.52/x
3. Step 3: Cross multiply
   105.58x = 158.43 × 57.52
4. Step 4: Simplify right side
   105.58x = 9,112.89
5. Step 5: Solve for x
   x = 9,112.89/105.58
6. Step 6: Final answer
   x = 86.31