Finding the Fourth Proportional to 89.98, 134.99 and 44.31

Step by Step Solution

1. Step 1: Write the proportion equation
   89.98 : 134.99 = 44.31 : x
2. Step 2: Convert to fraction form
   89.98/134.99 = 44.31/x
3. Step 3: Cross multiply
   89.98x = 134.99 × 44.31
4. Step 4: Simplify right side
   89.98x = 5,981.86
5. Step 5: Solve for x
   x = 5,981.86/89.98
6. Step 6: Final answer
   x = 66.48