Finding the Fourth Proportional to 105.60, 158.46 and 57.50

Step by Step Solution

1. Step 1: Write the proportion equation
   105.60 : 158.46 = 57.50 : x
2. Step 2: Convert to fraction form
   105.60/158.46 = 57.50/x
3. Step 3: Cross multiply
   105.60x = 158.46 × 57.50
4. Step 4: Simplify right side
   105.60x = 9,111.45
5. Step 5: Solve for x
   x = 9,111.45/105.60
6. Step 6: Final answer
   x = 86.28