Finding the Fourth Proportional to 2,180.60, 3,009.21 and 1,185.87

Step by Step Solution

1. Step 1: Write the proportion equation
   2,180.60 : 3,009.21 = 1,185.87 : x
2. Step 2: Convert to fraction form
   2,180.60/3,009.21 = 1,185.87/x
3. Step 3: Cross multiply
   2,180.60x = 3,009.21 × 1,185.87
4. Step 4: Simplify right side
   2,180.60x = 3,568,531.86
5. Step 5: Solve for x
   x = 3,568,531.86/2,180.60
6. Step 6: Final answer
   x = 1,636.49