Finding the Fourth Proportional to 1,394.45, 1,924.42 and 805.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,394.45 : 1,924.42 = 805.18 : x
2. Step 2: Convert to fraction form
   1,394.45/1,924.42 = 805.18/x
3. Step 3: Cross multiply
   1,394.45x = 1,924.42 × 805.18
4. Step 4: Simplify right side
   1,394.45x = 1,549,504.50
5. Step 5: Solve for x
   x = 1,549,504.50/1,394.45
6. Step 6: Final answer
   x = 1,111.19