Finding the Fourth Proportional to 2,181, 3,272.55 and 1,085.46

Step by Step Solution

1. Step 1: Write the proportion equation
   2,181 : 3,272.55 = 1,085.46 : x
2. Step 2: Convert to fraction form
   2,181/3,272.55 = 1,085.46/x
3. Step 3: Cross multiply
   2,181x = 3,272.55 × 1,085.46
4. Step 4: Simplify right side
   2,181x = 3,552,222.12
5. Step 5: Solve for x
   x = 3,552,222.12/2,181
6. Step 6: Final answer
   x = 1,628.71