Finding the Fourth Proportional to 1,271.98, 1,755.41 and 712.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,271.98 : 1,755.41 = 712.43 : x
2. Step 2: Convert to fraction form
   1,271.98/1,755.41 = 712.43/x
3. Step 3: Cross multiply
   1,271.98x = 1,755.41 × 712.43
4. Step 4: Simplify right side
   1,271.98x = 1,250,616.88
5. Step 5: Solve for x
   x = 1,250,616.88/1,271.98
6. Step 6: Final answer
   x = 983.21