Finding the Fourth Proportional to 1,271.55, 1,754.78 and 712.04

Step by Step Solution

1. Step 1: Write the proportion equation
   1,271.55 : 1,754.78 = 712.04 : x
2. Step 2: Convert to fraction form
   1,271.55/1,754.78 = 712.04/x
3. Step 3: Cross multiply
   1,271.55x = 1,754.78 × 712.04
4. Step 4: Simplify right side
   1,271.55x = 1,249,473.55
5. Step 5: Solve for x
   x = 1,249,473.55/1,271.55
6. Step 6: Final answer
   x = 982.64