Finding the Fourth Proportional to 2,005.53, 2,767.73 and 1,209.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,005.53 : 2,767.73 = 1,209.10 : x
2. Step 2: Convert to fraction form
   2,005.53/2,767.73 = 1,209.10/x
3. Step 3: Cross multiply
   2,005.53x = 2,767.73 × 1,209.10
4. Step 4: Simplify right side
   2,005.53x = 3,346,469.15
5. Step 5: Solve for x
   x = 3,346,469.15/2,005.53
6. Step 6: Final answer
   x = 1,668.62