Finding the Fourth Proportional to 1,405.83, 1,940.17 and 816.33

Step by Step Solution

1. Step 1: Write the proportion equation
   1,405.83 : 1,940.17 = 816.33 : x
2. Step 2: Convert to fraction form
   1,405.83/1,940.17 = 816.33/x
3. Step 3: Cross multiply
   1,405.83x = 1,940.17 × 816.33
4. Step 4: Simplify right side
   1,405.83x = 1,583,811.38
5. Step 5: Solve for x
   x = 1,583,811.38/1,405.83
6. Step 6: Final answer
   x = 1,126.60