Finding the Fourth Proportional to 2,181.11, 3,273.32 and 1,086.39

Step by Step Solution

1. Step 1: Write the proportion equation
   2,181.11 : 3,273.32 = 1,086.39 : x
2. Step 2: Convert to fraction form
   2,181.11/3,273.32 = 1,086.39/x
3. Step 3: Cross multiply
   2,181.11x = 3,273.32 × 1,086.39
4. Step 4: Simplify right side
   2,181.11x = 3,556,104.83
5. Step 5: Solve for x
   x = 3,556,104.83/2,181.11
6. Step 6: Final answer
   x = 1,630.41