Finding the Fourth Proportional to 2,389.72, 3,289.26 and 2,198.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,389.72 : 3,289.26 = 2,198.56 : x
2. Step 2: Convert to fraction form
   2,389.72/3,289.26 = 2,198.56/x
3. Step 3: Cross multiply
   2,389.72x = 3,289.26 × 2,198.56
4. Step 4: Simplify right side
   2,389.72x = 7,231,635.47
5. Step 5: Solve for x
   x = 7,231,635.47/2,389.72
6. Step 6: Final answer
   x = 3,026.14