Finding the Fourth Proportional to 851.27, 1,174.72 and 478.27

Step by Step Solution

1. Step 1: Write the proportion equation
   851.27 : 1,174.72 = 478.27 : x
2. Step 2: Convert to fraction form
   851.27/1,174.72 = 478.27/x
3. Step 3: Cross multiply
   851.27x = 1,174.72 × 478.27
4. Step 4: Simplify right side
   851.27x = 561,833.33
5. Step 5: Solve for x
   x = 561,833.33/851.27
6. Step 6: Final answer
   x = 659.99