Finding the Fourth Proportional to 517.61, 772.69 and 443.69

Step by Step Solution

1. Step 1: Write the proportion equation
   517.61 : 772.69 = 443.69 : x
2. Step 2: Convert to fraction form
   517.61/772.69 = 443.69/x
3. Step 3: Cross multiply
   517.61x = 772.69 × 443.69
4. Step 4: Simplify right side
   517.61x = 342,834.83
5. Step 5: Solve for x
   x = 342,834.83/517.61
6. Step 6: Final answer
   x = 662.34