Finding the Fourth Proportional to 1,031.31, 1,554.04 and 852.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,031.31 : 1,554.04 = 852.71 : x
2. Step 2: Convert to fraction form
   1,031.31/1,554.04 = 852.71/x
3. Step 3: Cross multiply
   1,031.31x = 1,554.04 × 852.71
4. Step 4: Simplify right side
   1,031.31x = 1,325,138.74
5. Step 5: Solve for x
   x = 1,325,138.74/1,031.31
6. Step 6: Final answer
   x = 1,284.91