Finding the Fourth Proportional to 2,257.89, 3,391.29 and 2,160.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,257.89 : 3,391.29 = 2,160.69 : x
2. Step 2: Convert to fraction form
   2,257.89/3,391.29 = 2,160.69/x
3. Step 3: Cross multiply
   2,257.89x = 3,391.29 × 2,160.69
4. Step 4: Simplify right side
   2,257.89x = 7,327,526.39
5. Step 5: Solve for x
   x = 7,327,526.39/2,257.89
6. Step 6: Final answer
   x = 3,245.30