Finding the Fourth Proportional to 1,399.94, 1,932.14 and 810.81

Step by Step Solution

1. Step 1: Write the proportion equation
   1,399.94 : 1,932.14 = 810.81 : x
2. Step 2: Convert to fraction form
   1,399.94/1,932.14 = 810.81/x
3. Step 3: Cross multiply
   1,399.94x = 1,932.14 × 810.81
4. Step 4: Simplify right side
   1,399.94x = 1,566,594.38
5. Step 5: Solve for x
   x = 1,566,594.38/1,399.94
6. Step 6: Final answer
   x = 1,119.05