Finding the Fourth Proportional to 1,610.10, 2,222.06 and 902.11

Step by Step Solution

1. Step 1: Write the proportion equation
   1,610.10 : 2,222.06 = 902.11 : x
2. Step 2: Convert to fraction form
   1,610.10/2,222.06 = 902.11/x
3. Step 3: Cross multiply
   1,610.10x = 2,222.06 × 902.11
4. Step 4: Simplify right side
   1,610.10x = 2,004,542.55
5. Step 5: Solve for x
   x = 2,004,542.55/1,610.10
6. Step 6: Final answer
   x = 1,244.98