Finding the Fourth Proportional to 1,601.40, 2,209.98 and 902.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,601.40 : 2,209.98 = 902.76 : x
2. Step 2: Convert to fraction form
   1,601.40/2,209.98 = 902.76/x
3. Step 3: Cross multiply
   1,601.40x = 2,209.98 × 902.76
4. Step 4: Simplify right side
   1,601.40x = 1,995,081.54
5. Step 5: Solve for x
   x = 1,995,081.54/1,601.40
6. Step 6: Final answer
   x = 1,245.84