Finding the Fourth Proportional to 2,005.43, 2,768.58 and 1,208.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,005.43 : 2,768.58 = 1,208.89 : x
2. Step 2: Convert to fraction form
   2,005.43/2,768.58 = 1,208.89/x
3. Step 3: Cross multiply
   2,005.43x = 2,768.58 × 1,208.89
4. Step 4: Simplify right side
   2,005.43x = 3,346,917.98
5. Step 5: Solve for x
   x = 3,346,917.98/2,005.43
6. Step 6: Final answer
   x = 1,668.93