Finding the Fourth Proportional to 2,287.72, 3,432.58 and 2,189.32

Step by Step Solution

1. Step 1: Write the proportion equation
   2,287.72 : 3,432.58 = 2,189.32 : x
2. Step 2: Convert to fraction form
   2,287.72/3,432.58 = 2,189.32/x
3. Step 3: Cross multiply
   2,287.72x = 3,432.58 × 2,189.32
4. Step 4: Simplify right side
   2,287.72x = 7,515,016.05
5. Step 5: Solve for x
   x = 7,515,016.05/2,287.72
6. Step 6: Final answer
   x = 3,284.94