Finding the Fourth Proportional to 94.18, 140.31 and 89.83

Step by Step Solution

1. Step 1: Write the proportion equation
   94.18 : 140.31 = 89.83 : x
2. Step 2: Convert to fraction form
   94.18/140.31 = 89.83/x
3. Step 3: Cross multiply
   94.18x = 140.31 × 89.83
4. Step 4: Simplify right side
   94.18x = 12,604.05
5. Step 5: Solve for x
   x = 12,604.05/94.18
6. Step 6: Final answer
   x = 133.83