Finding the Fourth Proportional to 2,181.78, 3,273.30 and 1,085.94

Step by Step Solution

1. Step 1: Write the proportion equation
   2,181.78 : 3,273.30 = 1,085.94 : x
2. Step 2: Convert to fraction form
   2,181.78/3,273.30 = 1,085.94/x
3. Step 3: Cross multiply
   2,181.78x = 3,273.30 × 1,085.94
4. Step 4: Simplify right side
   2,181.78x = 3,554,607.40
5. Step 5: Solve for x
   x = 3,554,607.40/2,181.78
6. Step 6: Final answer
   x = 1,629.22