Finding the Fourth Proportional to 1,648.22, 2,274.55 and 902.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,648.22 : 2,274.55 = 902.18 : x
2. Step 2: Convert to fraction form
   1,648.22/2,274.55 = 902.18/x
3. Step 3: Cross multiply
   1,648.22x = 2,274.55 × 902.18
4. Step 4: Simplify right side
   1,648.22x = 2,052,049.01
5. Step 5: Solve for x
   x = 2,052,049.01/1,648.22
6. Step 6: Final answer
   x = 1,245.01