Finding the Fourth Proportional to 1,271.07, 1,754.00 and 711.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,271.07 : 1,754.00 = 711.57 : x
2. Step 2: Convert to fraction form
   1,271.07/1,754.00 = 711.57/x
3. Step 3: Cross multiply
   1,271.07x = 1,754.00 × 711.57
4. Step 4: Simplify right side
   1,271.07x = 1,248,090.22
5. Step 5: Solve for x
   x = 1,248,090.22/1,271.07
6. Step 6: Final answer
   x = 981.92