Finding the Fourth Proportional to 1,673.83, 2,509.83 and 699.20

Step by Step Solution

1. Step 1: Write the proportion equation
   1,673.83 : 2,509.83 = 699.20 : x
2. Step 2: Convert to fraction form
   1,673.83/2,509.83 = 699.20/x
3. Step 3: Cross multiply
   1,673.83x = 2,509.83 × 699.20
4. Step 4: Simplify right side
   1,673.83x = 1,754,860.59
5. Step 5: Solve for x
   x = 1,754,860.59/1,673.83
6. Step 6: Final answer
   x = 1,048.41