Finding the Fourth Proportional to 2,167.89, 3,253.65 and 1,128.25

Step by Step Solution

1. Step 1: Write the proportion equation
   2,167.89 : 3,253.65 = 1,128.25 : x
2. Step 2: Convert to fraction form
   2,167.89/3,253.65 = 1,128.25/x
3. Step 3: Cross multiply
   2,167.89x = 3,253.65 × 1,128.25
4. Step 4: Simplify right side
   2,167.89x = 3,670,930.61
5. Step 5: Solve for x
   x = 3,670,930.61/2,167.89
6. Step 6: Final answer
   x = 1,693.32