Finding the Fourth Proportional to 1,365.39, 1,883.84 and 805.91

Step by Step Solution

1. Step 1: Write the proportion equation
   1,365.39 : 1,883.84 = 805.91 : x
2. Step 2: Convert to fraction form
   1,365.39/1,883.84 = 805.91/x
3. Step 3: Cross multiply
   1,365.39x = 1,883.84 × 805.91
4. Step 4: Simplify right side
   1,365.39x = 1,518,192.05
5. Step 5: Solve for x
   x = 1,518,192.05/1,365.39
6. Step 6: Final answer
   x = 1,111.91