Finding the Fourth Proportional to 1,272.51, 1,755.37 and 817.49

Step by Step Solution

1. Step 1: Write the proportion equation
   1,272.51 : 1,755.37 = 817.49 : x
2. Step 2: Convert to fraction form
   1,272.51/1,755.37 = 817.49/x
3. Step 3: Cross multiply
   1,272.51x = 1,755.37 × 817.49
4. Step 4: Simplify right side
   1,272.51x = 1,435,002.83
5. Step 5: Solve for x
   x = 1,435,002.83/1,272.51
6. Step 6: Final answer
   x = 1,127.69