Finding the Fourth Proportional to 1,600.89, 2,209.25 and 902.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,600.89 : 2,209.25 = 902.25 : x
2. Step 2: Convert to fraction form
   1,600.89/2,209.25 = 902.25/x
3. Step 3: Cross multiply
   1,600.89x = 2,209.25 × 902.25
4. Step 4: Simplify right side
   1,600.89x = 1,993,291.30
5. Step 5: Solve for x
   x = 1,993,291.30/1,600.89
6. Step 6: Final answer
   x = 1,245.11