Finding the Fourth Proportional to 2,180.28, 3,008.80 and 1,185.57

Step by Step Solution

1. Step 1: Write the proportion equation
   2,180.28 : 3,008.80 = 1,185.57 : x
2. Step 2: Convert to fraction form
   2,180.28/3,008.80 = 1,185.57/x
3. Step 3: Cross multiply
   2,180.28x = 3,008.80 × 1,185.57
4. Step 4: Simplify right side
   2,180.28x = 3,567,147.83
5. Step 5: Solve for x
   x = 3,567,147.83/2,180.28
6. Step 6: Final answer
   x = 1,636.09