Finding the Fourth Proportional to 105.73, 158.48 and 69.05

Step by Step Solution

1. Step 1: Write the proportion equation
   105.73 : 158.48 = 69.05 : x
2. Step 2: Convert to fraction form
   105.73/158.48 = 69.05/x
3. Step 3: Cross multiply
   105.73x = 158.48 × 69.05
4. Step 4: Simplify right side
   105.73x = 10,943.55
5. Step 5: Solve for x
   x = 10,943.55/105.73
6. Step 6: Final answer
   x = 103.50