Finding the Fourth Proportional to 2,289.43, 3,411.59 and 2,215.09

Step by Step Solution

1. Step 1: Write the proportion equation
   2,289.43 : 3,411.59 = 2,215.09 : x
2. Step 2: Convert to fraction form
   2,289.43/3,411.59 = 2,215.09/x
3. Step 3: Cross multiply
   2,289.43x = 3,411.59 × 2,215.09
4. Step 4: Simplify right side
   2,289.43x = 7,556,978.89
5. Step 5: Solve for x
   x = 7,556,978.89/2,289.43
6. Step 6: Final answer
   x = 3,300.81