Finding the Fourth Proportional to 1,728.78, 2,591.73 and 754.17

Step by Step Solution

1. Step 1: Write the proportion equation
   1,728.78 : 2,591.73 = 754.17 : x
2. Step 2: Convert to fraction form
   1,728.78/2,591.73 = 754.17/x
3. Step 3: Cross multiply
   1,728.78x = 2,591.73 × 754.17
4. Step 4: Simplify right side
   1,728.78x = 1,954,605.01
5. Step 5: Solve for x
   x = 1,954,605.01/1,728.78
6. Step 6: Final answer
   x = 1,130.63