Finding the Fourth Proportional to 2,256.89, 3,389.79 and 2,159.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,256.89 : 3,389.79 = 2,159.69 : x
2. Step 2: Convert to fraction form
   2,256.89/3,389.79 = 2,159.69/x
3. Step 3: Cross multiply
   2,256.89x = 3,389.79 × 2,159.69
4. Step 4: Simplify right side
   2,256.89x = 7,320,895.57
5. Step 5: Solve for x
   x = 7,320,895.57/2,256.89
6. Step 6: Final answer
   x = 3,243.80