Finding the Fourth Proportional to 85.35, 128.04 and 34.00

Step by Step Solution

1. Step 1: Write the proportion equation
   85.35 : 128.04 = 34.00 : x
2. Step 2: Convert to fraction form
   85.35/128.04 = 34.00/x
3. Step 3: Cross multiply
   85.35x = 128.04 × 34.00
4. Step 4: Simplify right side
   85.35x = 4,352.55
5. Step 5: Solve for x
   x = 4,352.55/85.35
6. Step 6: Final answer
   x = 51.00