Finding the Fourth Proportional to 2,689.58, 4,028.69 and 1,229.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,689.58 : 4,028.69 = 1,229.96 : x
2. Step 2: Convert to fraction form
   2,689.58/4,028.69 = 1,229.96/x
3. Step 3: Cross multiply
   2,689.58x = 4,028.69 × 1,229.96
4. Step 4: Simplify right side
   2,689.58x = 4,955,110.48
5. Step 5: Solve for x
   x = 4,955,110.48/2,689.58
6. Step 6: Final answer
   x = 1,842.34