Finding the Fourth Proportional to 2,189.04, 3,284.16 and 1,215.84

Step by Step Solution

1. Step 1: Write the proportion equation
   2,189.04 : 3,284.16 = 1,215.84 : x
2. Step 2: Convert to fraction form
   2,189.04/3,284.16 = 1,215.84/x
3. Step 3: Cross multiply
   2,189.04x = 3,284.16 × 1,215.84
4. Step 4: Simplify right side
   2,189.04x = 3,993,013.09
5. Step 5: Solve for x
   x = 3,993,013.09/2,189.04
6. Step 6: Final answer
   x = 1,824.09