Finding the Fourth Proportional to 1,369.08, 1,889.55 and 809.73

Step by Step Solution

1. Step 1: Write the proportion equation
   1,369.08 : 1,889.55 = 809.73 : x
2. Step 2: Convert to fraction form
   1,369.08/1,889.55 = 809.73/x
3. Step 3: Cross multiply
   1,369.08x = 1,889.55 × 809.73
4. Step 4: Simplify right side
   1,369.08x = 1,530,025.32
5. Step 5: Solve for x
   x = 1,530,025.32/1,369.08
6. Step 6: Final answer
   x = 1,117.56