Finding the Fourth Proportional to 1,272.25, 1,755.59 and 712.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,272.25 : 1,755.59 = 712.54 : x
2. Step 2: Convert to fraction form
   1,272.25/1,755.59 = 712.54/x
3. Step 3: Cross multiply
   1,272.25x = 1,755.59 × 712.54
4. Step 4: Simplify right side
   1,272.25x = 1,250,928.10
5. Step 5: Solve for x
   x = 1,250,928.10/1,272.25
6. Step 6: Final answer
   x = 983.24