Finding the Fourth Proportional to 2,281.89, 3,419.59 and 1,128.45

Step by Step Solution

1. Step 1: Write the proportion equation
   2,281.89 : 3,419.59 = 1,128.45 : x
2. Step 2: Convert to fraction form
   2,281.89/3,419.59 = 1,128.45/x
3. Step 3: Cross multiply
   2,281.89x = 3,419.59 × 1,128.45
4. Step 4: Simplify right side
   2,281.89x = 3,858,836.34
5. Step 5: Solve for x
   x = 3,858,836.34/2,281.89
6. Step 6: Final answer
   x = 1,691.07