Finding the Fourth Proportional to 2,190.49, 3,286.37 and 1,080.24

Step by Step Solution

1. Step 1: Write the proportion equation
   2,190.49 : 3,286.37 = 1,080.24 : x
2. Step 2: Convert to fraction form
   2,190.49/3,286.37 = 1,080.24/x
3. Step 3: Cross multiply
   2,190.49x = 3,286.37 × 1,080.24
4. Step 4: Simplify right side
   2,190.49x = 3,550,072.67
5. Step 5: Solve for x
   x = 3,550,072.67/2,190.49
6. Step 6: Final answer
   x = 1,620.67