Finding the Fourth Proportional to 1,104.72, 1,523.36 and 711.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,104.72 : 1,523.36 = 711.28 : x
2. Step 2: Convert to fraction form
   1,104.72/1,523.36 = 711.28/x
3. Step 3: Cross multiply
   1,104.72x = 1,523.36 × 711.28
4. Step 4: Simplify right side
   1,104.72x = 1,083,535.50
5. Step 5: Solve for x
   x = 1,083,535.50/1,104.72
6. Step 6: Final answer
   x = 980.82