Finding the Fourth Proportional to 1,031.02, 1,422.72 and 611.33

Step by Step Solution

1. Step 1: Write the proportion equation
   1,031.02 : 1,422.72 = 611.33 : x
2. Step 2: Convert to fraction form
   1,031.02/1,422.72 = 611.33/x
3. Step 3: Cross multiply
   1,031.02x = 1,422.72 × 611.33
4. Step 4: Simplify right side
   1,031.02x = 869,754.97
5. Step 5: Solve for x
   x = 869,754.97/1,031.02
6. Step 6: Final answer
   x = 843.59