Finding the Fourth Proportional to 2,048.45, 2,826.78 and 1,209.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,048.45 : 2,826.78 = 1,209.20 : x
2. Step 2: Convert to fraction form
   2,048.45/2,826.78 = 1,209.20/x
3. Step 3: Cross multiply
   2,048.45x = 2,826.78 × 1,209.20
4. Step 4: Simplify right side
   2,048.45x = 3,418,142.38
5. Step 5: Solve for x
   x = 3,418,142.38/2,048.45
6. Step 6: Final answer
   x = 1,668.65