Finding the Fourth Proportional to 2,180.15, 3,008.55 and 1,185.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,180.15 : 3,008.55 = 1,185.40 : x
2. Step 2: Convert to fraction form
   2,180.15/3,008.55 = 1,185.40/x
3. Step 3: Cross multiply
   2,180.15x = 3,008.55 × 1,185.40
4. Step 4: Simplify right side
   2,180.15x = 3,566,335.17
5. Step 5: Solve for x
   x = 3,566,335.17/2,180.15
6. Step 6: Final answer
   x = 1,635.82