Finding the Fourth Proportional to 1,409.49, 1,944.71 and 819.81

Step by Step Solution

1. Step 1: Write the proportion equation
   1,409.49 : 1,944.71 = 819.81 : x
2. Step 2: Convert to fraction form
   1,409.49/1,944.71 = 819.81/x
3. Step 3: Cross multiply
   1,409.49x = 1,944.71 × 819.81
4. Step 4: Simplify right side
   1,409.49x = 1,594,288.61
5. Step 5: Solve for x
   x = 1,594,288.61/1,409.49
6. Step 6: Final answer
   x = 1,131.11