Finding the Fourth Proportional to 1,274.69, 1,759.78 and 803.19

Step by Step Solution

1. Step 1: Write the proportion equation
   1,274.69 : 1,759.78 = 803.19 : x
2. Step 2: Convert to fraction form
   1,274.69/1,759.78 = 803.19/x
3. Step 3: Cross multiply
   1,274.69x = 1,759.78 × 803.19
4. Step 4: Simplify right side
   1,274.69x = 1,413,435.83
5. Step 5: Solve for x
   x = 1,413,435.83/1,274.69
6. Step 6: Final answer
   x = 1,108.85