Finding the Fourth Proportional to 1,017.59, 1,404.41 and 808.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,017.59 : 1,404.41 = 808.61 : x
2. Step 2: Convert to fraction form
   1,017.59/1,404.41 = 808.61/x
3. Step 3: Cross multiply
   1,017.59x = 1,404.41 × 808.61
4. Step 4: Simplify right side
   1,017.59x = 1,135,608.91
5. Step 5: Solve for x
   x = 1,135,608.91/1,017.59
6. Step 6: Final answer
   x = 1,115.98