Finding the Fourth Proportional to 2,180.59, 3,009.15 and 1,185.91

Step by Step Solution

1. Step 1: Write the proportion equation
   2,180.59 : 3,009.15 = 1,185.91 : x
2. Step 2: Convert to fraction form
   2,180.59/3,009.15 = 1,185.91/x
3. Step 3: Cross multiply
   2,180.59x = 3,009.15 × 1,185.91
4. Step 4: Simplify right side
   2,180.59x = 3,568,573.55
5. Step 5: Solve for x
   x = 3,568,573.55/2,180.59
6. Step 6: Final answer
   x = 1,636.52