Finding the Fourth Proportional to 85.43, 128.15 and 44.83

Step by Step Solution

1. Step 1: Write the proportion equation
   85.43 : 128.15 = 44.83 : x
2. Step 2: Convert to fraction form
   85.43/128.15 = 44.83/x
3. Step 3: Cross multiply
   85.43x = 128.15 × 44.83
4. Step 4: Simplify right side
   85.43x = 5,744.10
5. Step 5: Solve for x
   x = 5,744.10/85.43
6. Step 6: Final answer
   x = 67.24