Finding the Fourth Proportional to 1,271.61, 1,754.71 and 712.03

Step by Step Solution

1. Step 1: Write the proportion equation
   1,271.61 : 1,754.71 = 712.03 : x
2. Step 2: Convert to fraction form
   1,271.61/1,754.71 = 712.03/x
3. Step 3: Cross multiply
   1,271.61x = 1,754.71 × 712.03
4. Step 4: Simplify right side
   1,271.61x = 1,249,406.16
5. Step 5: Solve for x
   x = 1,249,406.16/1,271.61
6. Step 6: Final answer
   x = 982.54