Finding the Fourth Proportional to 1,396.09, 1,926.71 and 806.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,396.09 : 1,926.71 = 806.82 : x
2. Step 2: Convert to fraction form
   1,396.09/1,926.71 = 806.82/x
3. Step 3: Cross multiply
   1,396.09x = 1,926.71 × 806.82
4. Step 4: Simplify right side
   1,396.09x = 1,554,508.16
5. Step 5: Solve for x
   x = 1,554,508.16/1,396.09
6. Step 6: Final answer
   x = 1,113.47