Finding the Fourth Proportional to 1,400.79, 1,932.96 and 811.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,400.79 : 1,932.96 = 811.27 : x
2. Step 2: Convert to fraction form
   1,400.79/1,932.96 = 811.27/x
3. Step 3: Cross multiply
   1,400.79x = 1,932.96 × 811.27
4. Step 4: Simplify right side
   1,400.79x = 1,568,147.04
5. Step 5: Solve for x
   x = 1,568,147.04/1,400.79
6. Step 6: Final answer
   x = 1,119.47