Finding the Fourth Proportional to 1,394.66, 1,924.98 and 805.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,394.66 : 1,924.98 = 805.56 : x
2. Step 2: Convert to fraction form
   1,394.66/1,924.98 = 805.56/x
3. Step 3: Cross multiply
   1,394.66x = 1,924.98 × 805.56
4. Step 4: Simplify right side
   1,394.66x = 1,550,686.89
5. Step 5: Solve for x
   x = 1,550,686.89/1,394.66
6. Step 6: Final answer
   x = 1,111.87