Finding the Fourth Proportional to 1,271.42, 1,754.53 and 711.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,271.42 : 1,754.53 = 711.89 : x
2. Step 2: Convert to fraction form
   1,271.42/1,754.53 = 711.89/x
3. Step 3: Cross multiply
   1,271.42x = 1,754.53 × 711.89
4. Step 4: Simplify right side
   1,271.42x = 1,249,032.36
5. Step 5: Solve for x
   x = 1,249,032.36/1,271.42
6. Step 6: Final answer
   x = 982.39