Finding the Fourth Proportional to 2,181.48, 3,274.64 and 1,085.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,181.48 : 3,274.64 = 1,085.55 : x
2. Step 2: Convert to fraction form
   2,181.48/3,274.64 = 1,085.55/x
3. Step 3: Cross multiply
   2,181.48x = 3,274.64 × 1,085.55
4. Step 4: Simplify right side
   2,181.48x = 3,554,785.45
5. Step 5: Solve for x
   x = 3,554,785.45/2,181.48
6. Step 6: Final answer
   x = 1,629.53