Finding the Fourth Proportional to 105.53, 158.17 and 59.79

Step by Step Solution

1. Step 1: Write the proportion equation
   105.53 : 158.17 = 59.79 : x
2. Step 2: Convert to fraction form
   105.53/158.17 = 59.79/x
3. Step 3: Cross multiply
   105.53x = 158.17 × 59.79
4. Step 4: Simplify right side
   105.53x = 9,455.89
5. Step 5: Solve for x
   x = 9,455.89/105.53
6. Step 6: Final answer
   x = 89.60