Finding the Fourth Proportional to 1,280.56, 1,768.48 and 1,103.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,280.56 : 1,768.48 = 1,103.18 : x
2. Step 2: Convert to fraction form
   1,280.56/1,768.48 = 1,103.18/x
3. Step 3: Cross multiply
   1,280.56x = 1,768.48 × 1,103.18
4. Step 4: Simplify right side
   1,280.56x = 1,950,951.77
5. Step 5: Solve for x
   x = 1,950,951.77/1,280.56
6. Step 6: Final answer
   x = 1,523.51