Finding the Fourth Proportional to 1,469.78, 2,028.32 and 806.65

Step by Step Solution

1. Step 1: Write the proportion equation
   1,469.78 : 2,028.32 = 806.65 : x
2. Step 2: Convert to fraction form
   1,469.78/2,028.32 = 806.65/x
3. Step 3: Cross multiply
   1,469.78x = 2,028.32 × 806.65
4. Step 4: Simplify right side
   1,469.78x = 1,636,144.33
5. Step 5: Solve for x
   x = 1,636,144.33/1,469.78
6. Step 6: Final answer
   x = 1,113.19