Finding the Fourth Proportional to 1,271.42, 1,754.50 and 711.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,271.42 : 1,754.50 = 711.96 : x
2. Step 2: Convert to fraction form
   1,271.42/1,754.50 = 711.96/x
3. Step 3: Cross multiply
   1,271.42x = 1,754.50 × 711.96
4. Step 4: Simplify right side
   1,271.42x = 1,249,133.82
5. Step 5: Solve for x
   x = 1,249,133.82/1,271.42
6. Step 6: Final answer
   x = 982.47