Finding the Fourth Proportional to 108.27, 149.31 and 89.82

Step by Step Solution

1. Step 1: Write the proportion equation
   108.27 : 149.31 = 89.82 : x
2. Step 2: Convert to fraction form
   108.27/149.31 = 89.82/x
3. Step 3: Cross multiply
   108.27x = 149.31 × 89.82
4. Step 4: Simplify right side
   108.27x = 13,411.02
5. Step 5: Solve for x
   x = 13,411.02/108.27
6. Step 6: Final answer
   x = 123.87