Finding the Fourth Proportional to 105.93, 158.21 and 100.77

Step by Step Solution

1. Step 1: Write the proportion equation
   105.93 : 158.21 = 100.77 : x
2. Step 2: Convert to fraction form
   105.93/158.21 = 100.77/x
3. Step 3: Cross multiply
   105.93x = 158.21 × 100.77
4. Step 4: Simplify right side
   105.93x = 15,942.32
5. Step 5: Solve for x
   x = 15,942.32/105.93
6. Step 6: Final answer
   x = 150.50