Finding the Fourth Proportional to 1,391.82, 1,920.27 and 802.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,391.82 : 1,920.27 = 802.27 : x
2. Step 2: Convert to fraction form
   1,391.82/1,920.27 = 802.27/x
3. Step 3: Cross multiply
   1,391.82x = 1,920.27 × 802.27
4. Step 4: Simplify right side
   1,391.82x = 1,540,575.01
5. Step 5: Solve for x
   x = 1,540,575.01/1,391.82
6. Step 6: Final answer
   x = 1,106.88