Finding the Fourth Proportional to 1,085.33, 1,498.39 and 712.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,085.33 : 1,498.39 = 712.96 : x
2. Step 2: Convert to fraction form
   1,085.33/1,498.39 = 712.96/x
3. Step 3: Cross multiply
   1,085.33x = 1,498.39 × 712.96
4. Step 4: Simplify right side
   1,085.33x = 1,068,286.61
5. Step 5: Solve for x
   x = 1,068,286.61/1,085.33
6. Step 6: Final answer
   x = 984.30