Finding the Fourth Proportional to 1,610.30, 2,222.40 and 902.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,610.30 : 2,222.40 = 902.18 : x
2. Step 2: Convert to fraction form
   1,610.30/2,222.40 = 902.18/x
3. Step 3: Cross multiply
   1,610.30x = 2,222.40 × 902.18
4. Step 4: Simplify right side
   1,610.30x = 2,004,993.72
5. Step 5: Solve for x
   x = 2,004,993.72/1,610.30
6. Step 6: Final answer
   x = 1,245.11