Finding the Fourth Proportional to 1,031.34, 1,423.17 and 611.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,031.34 : 1,423.17 = 611.61 : x
2. Step 2: Convert to fraction form
   1,031.34/1,423.17 = 611.61/x
3. Step 3: Cross multiply
   1,031.34x = 1,423.17 × 611.61
4. Step 4: Simplify right side
   1,031.34x = 870,425.00
5. Step 5: Solve for x
   x = 870,425.00/1,031.34
6. Step 6: Final answer
   x = 843.97