Finding the Fourth Proportional to 2,180.78, 3,009.41 and 1,186.03

Step by Step Solution

1. Step 1: Write the proportion equation
   2,180.78 : 3,009.41 = 1,186.03 : x
2. Step 2: Convert to fraction form
   2,180.78/3,009.41 = 1,186.03/x
3. Step 3: Cross multiply
   2,180.78x = 3,009.41 × 1,186.03
4. Step 4: Simplify right side
   2,180.78x = 3,569,250.54
5. Step 5: Solve for x
   x = 3,569,250.54/2,180.78
6. Step 6: Final answer
   x = 1,636.69