Finding the Fourth Proportional to 1,609.88, 2,223.45 and 1,085

Step by Step Solution

1. Step 1: Write the proportion equation
   1,609.88 : 2,223.45 = 1,085 : x
2. Step 2: Convert to fraction form
   1,609.88/2,223.45 = 1,085/x
3. Step 3: Cross multiply
   1,609.88x = 2,223.45 × 1,085
4. Step 4: Simplify right side
   1,609.88x = 2,412,443.25
5. Step 5: Solve for x
   x = 2,412,443.25/1,609.88
6. Step 6: Final answer
   x = 1,498.52