Finding the Fourth Proportional to 1,648.39, 2,274.78 and 902.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,648.39 : 2,274.78 = 902.38 : x
2. Step 2: Convert to fraction form
   1,648.39/2,274.78 = 902.38/x
3. Step 3: Cross multiply
   1,648.39x = 2,274.78 × 902.38
4. Step 4: Simplify right side
   1,648.39x = 2,052,715.98
5. Step 5: Solve for x
   x = 2,052,715.98/1,648.39
6. Step 6: Final answer
   x = 1,245.29