Finding the Fourth Proportional to 1,409.45, 1,944.78 and 811.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,409.45 : 1,944.78 = 811.83 : x
2. Step 2: Convert to fraction form
   1,409.45/1,944.78 = 811.83/x
3. Step 3: Cross multiply
   1,409.45x = 1,944.78 × 811.83
4. Step 4: Simplify right side
   1,409.45x = 1,578,830.75
5. Step 5: Solve for x
   x = 1,578,830.75/1,409.45
6. Step 6: Final answer
   x = 1,120.18