Finding the Fourth Proportional to 1,131.27, 1,559.88 and 711.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,131.27 : 1,559.88 = 711.10 : x
2. Step 2: Convert to fraction form
   1,131.27/1,559.88 = 711.10/x
3. Step 3: Cross multiply
   1,131.27x = 1,559.88 × 711.10
4. Step 4: Simplify right side
   1,131.27x = 1,109,239.00
5. Step 5: Solve for x
   x = 1,109,239.00/1,131.27
6. Step 6: Final answer
   x = 980.53