Finding the Fourth Proportional to 1,271.37, 1,754.25 and 711.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,271.37 : 1,754.25 = 711.78 : x
2. Step 2: Convert to fraction form
   1,271.37/1,754.25 = 711.78/x
3. Step 3: Cross multiply
   1,271.37x = 1,754.25 × 711.78
4. Step 4: Simplify right side
   1,271.37x = 1,248,640.07
5. Step 5: Solve for x
   x = 1,248,640.07/1,271.37
6. Step 6: Final answer
   x = 982.12