Finding the Fourth Proportional to 1,031.27, 1,422.56 and 611.35

Step by Step Solution

1. Step 1: Write the proportion equation
   1,031.27 : 1,422.56 = 611.35 : x
2. Step 2: Convert to fraction form
   1,031.27/1,422.56 = 611.35/x
3. Step 3: Cross multiply
   1,031.27x = 1,422.56 × 611.35
4. Step 4: Simplify right side
   1,031.27x = 869,680.03
5. Step 5: Solve for x
   x = 869,680.03/1,031.27
6. Step 6: Final answer
   x = 843.31