Finding the Fourth Proportional to 443.02, 611.35 and 256.52

Step by Step Solution

1. Step 1: Write the proportion equation
   443.02 : 611.35 = 256.52 : x
2. Step 2: Convert to fraction form
   443.02/611.35 = 256.52/x
3. Step 3: Cross multiply
   443.02x = 611.35 × 256.52
4. Step 4: Simplify right side
   443.02x = 156,823.50
5. Step 5: Solve for x
   x = 156,823.50/443.02
6. Step 6: Final answer
   x = 353.99