Finding the Fourth Proportional to 1,399.72, 1,932.27 and 810.14

Step by Step Solution

1. Step 1: Write the proportion equation
   1,399.72 : 1,932.27 = 810.14 : x
2. Step 2: Convert to fraction form
   1,399.72/1,932.27 = 810.14/x
3. Step 3: Cross multiply
   1,399.72x = 1,932.27 × 810.14
4. Step 4: Simplify right side
   1,399.72x = 1,565,403.76
5. Step 5: Solve for x
   x = 1,565,403.76/1,399.72
6. Step 6: Final answer
   x = 1,118.37