Finding the Fourth Proportional to 1,031.56, 1,423.46 and 589.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,031.56 : 1,423.46 = 589.30 : x
2. Step 2: Convert to fraction form
   1,031.56/1,423.46 = 589.30/x
3. Step 3: Cross multiply
   1,031.56x = 1,423.46 × 589.30
4. Step 4: Simplify right side
   1,031.56x = 838,844.98
5. Step 5: Solve for x
   x = 838,844.98/1,031.56
6. Step 6: Final answer
   x = 813.18