Finding the Fourth Proportional to 1,280.27, 1,766.25 and 808.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,280.27 : 1,766.25 = 808.02 : x
2. Step 2: Convert to fraction form
   1,280.27/1,766.25 = 808.02/x
3. Step 3: Cross multiply
   1,280.27x = 1,766.25 × 808.02
4. Step 4: Simplify right side
   1,280.27x = 1,427,165.33
5. Step 5: Solve for x
   x = 1,427,165.33/1,280.27
6. Step 6: Final answer
   x = 1,114.74