Finding the Fourth Proportional to 1,031.47, 1,423.42 and 559.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,031.47 : 1,423.42 = 559.37 : x
2. Step 2: Convert to fraction form
   1,031.47/1,423.42 = 559.37/x
3. Step 3: Cross multiply
   1,031.47x = 1,423.42 × 559.37
4. Step 4: Simplify right side
   1,031.47x = 796,211.50
5. Step 5: Solve for x
   x = 796,211.50/1,031.47
6. Step 6: Final answer
   x = 771.92