Finding the Fourth Proportional to 1,394.54, 1,924.80 and 805.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,394.54 : 1,924.80 = 805.31 : x
2. Step 2: Convert to fraction form
   1,394.54/1,924.80 = 805.31/x
3. Step 3: Cross multiply
   1,394.54x = 1,924.80 × 805.31
4. Step 4: Simplify right side
   1,394.54x = 1,550,060.69
5. Step 5: Solve for x
   x = 1,550,060.69/1,394.54
6. Step 6: Final answer
   x = 1,111.52