Finding the Fourth Proportional to 1,271.36, 1,754.61 and 711.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,271.36 : 1,754.61 = 711.98 : x
2. Step 2: Convert to fraction form
   1,271.36/1,754.61 = 711.98/x
3. Step 3: Cross multiply
   1,271.36x = 1,754.61 × 711.98
4. Step 4: Simplify right side
   1,271.36x = 1,249,238.45
5. Step 5: Solve for x
   x = 1,249,238.45/1,271.36
6. Step 6: Final answer
   x = 982.60