Finding the Fourth Proportional to 2,180.58, 3,009.18 and 1,185.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,180.58 : 3,009.18 = 1,185.89 : x
2. Step 2: Convert to fraction form
   2,180.58/3,009.18 = 1,185.89/x
3. Step 3: Cross multiply
   2,180.58x = 3,009.18 × 1,185.89
4. Step 4: Simplify right side
   2,180.58x = 3,568,541.42
5. Step 5: Solve for x
   x = 3,568,541.42/2,180.58
6. Step 6: Final answer
   x = 1,636.51