Finding the Fourth Proportional to 2,189.83, 3,284.04 and 728.59

Step by Step Solution

1. Step 1: Write the proportion equation
   2,189.83 : 3,284.04 = 728.59 : x
2. Step 2: Convert to fraction form
   2,189.83/3,284.04 = 728.59/x
3. Step 3: Cross multiply
   2,189.83x = 3,284.04 × 728.59
4. Step 4: Simplify right side
   2,189.83x = 2,392,718.70
5. Step 5: Solve for x
   x = 2,392,718.70/2,189.83
6. Step 6: Final answer
   x = 1,092.65