Finding the Fourth Proportional to 1,031.30, 1,423.22 and 589.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,031.30 : 1,423.22 = 589.31 : x
2. Step 2: Convert to fraction form
   1,031.30/1,423.22 = 589.31/x
3. Step 3: Cross multiply
   1,031.30x = 1,423.22 × 589.31
4. Step 4: Simplify right side
   1,031.30x = 838,707.72
5. Step 5: Solve for x
   x = 838,707.72/1,031.30
6. Step 6: Final answer
   x = 813.26