Finding the Fourth Proportional to 1,340.83, 1,849.79 and 816.80

Step by Step Solution

1. Step 1: Write the proportion equation
   1,340.83 : 1,849.79 = 816.80 : x
2. Step 2: Convert to fraction form
   1,340.83/1,849.79 = 816.80/x
3. Step 3: Cross multiply
   1,340.83x = 1,849.79 × 816.80
4. Step 4: Simplify right side
   1,340.83x = 1,510,904.39
5. Step 5: Solve for x
   x = 1,510,904.39/1,340.83
6. Step 6: Final answer
   x = 1,126.85