Finding the Fourth Proportional to 1,104.96, 1,524.78 and 712.20

Step by Step Solution

1. Step 1: Write the proportion equation
   1,104.96 : 1,524.78 = 712.20 : x
2. Step 2: Convert to fraction form
   1,104.96/1,524.78 = 712.20/x
3. Step 3: Cross multiply
   1,104.96x = 1,524.78 × 712.20
4. Step 4: Simplify right side
   1,104.96x = 1,085,948.32
5. Step 5: Solve for x
   x = 1,085,948.32/1,104.96
6. Step 6: Final answer
   x = 982.79