Finding the Fourth Proportional to 105.45, 158.18 and 59.77

Step by Step Solution

1. Step 1: Write the proportion equation
   105.45 : 158.18 = 59.77 : x
2. Step 2: Convert to fraction form
   105.45/158.18 = 59.77/x
3. Step 3: Cross multiply
   105.45x = 158.18 × 59.77
4. Step 4: Simplify right side
   105.45x = 9,453.72
5. Step 5: Solve for x
   x = 9,453.72/105.45
6. Step 6: Final answer
   x = 89.65