Finding the Fourth Proportional to 773.22, 1,066.59 and 478.29

Step by Step Solution

1. Step 1: Write the proportion equation
   773.22 : 1,066.59 = 478.29 : x
2. Step 2: Convert to fraction form
   773.22/1,066.59 = 478.29/x
3. Step 3: Cross multiply
   773.22x = 1,066.59 × 478.29
4. Step 4: Simplify right side
   773.22x = 510,139.33
5. Step 5: Solve for x
   x = 510,139.33/773.22
6. Step 6: Final answer
   x = 659.76