Finding the Fourth Proportional to 1,278.72, 1,764.72 and 1,104.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,278.72 : 1,764.72 = 1,104.48 : x
2. Step 2: Convert to fraction form
   1,278.72/1,764.72 = 1,104.48/x
3. Step 3: Cross multiply
   1,278.72x = 1,764.72 × 1,104.48
4. Step 4: Simplify right side
   1,278.72x = 1,949,097.95
5. Step 5: Solve for x
   x = 1,949,097.95/1,278.72
6. Step 6: Final answer
   x = 1,524.26