Finding the Fourth Proportional to 105.60, 158.58 and 56.82

Step by Step Solution

1. Step 1: Write the proportion equation
   105.60 : 158.58 = 56.82 : x
2. Step 2: Convert to fraction form
   105.60/158.58 = 56.82/x
3. Step 3: Cross multiply
   105.60x = 158.58 × 56.82
4. Step 4: Simplify right side
   105.60x = 9,010.52
5. Step 5: Solve for x
   x = 9,010.52/105.60
6. Step 6: Final answer
   x = 85.33