Finding the Fourth Proportional to 1,383.83, 2,074.25 and 681.53

Step by Step Solution

1. Step 1: Write the proportion equation
   1,383.83 : 2,074.25 = 681.53 : x
2. Step 2: Convert to fraction form
   1,383.83/2,074.25 = 681.53/x
3. Step 3: Cross multiply
   1,383.83x = 2,074.25 × 681.53
4. Step 4: Simplify right side
   1,383.83x = 1,413,649.82
5. Step 5: Solve for x
   x = 1,413,649.82/1,383.83
6. Step 6: Final answer
   x = 1,021.55