Finding the Fourth Proportional to 85.37, 128.54 and 62.69

Step by Step Solution

1. Step 1: Write the proportion equation
   85.37 : 128.54 = 62.69 : x
2. Step 2: Convert to fraction form
   85.37/128.54 = 62.69/x
3. Step 3: Cross multiply
   85.37x = 128.54 × 62.69
4. Step 4: Simplify right side
   85.37x = 8,057.69
5. Step 5: Solve for x
   x = 8,057.69/85.37
6. Step 6: Final answer
   x = 94.39