Finding the Fourth Proportional to 1,123.40, 1,549.32 and 902.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123.40 : 1,549.32 = 902.27 : x
2. Step 2: Convert to fraction form
   1,123.40/1,549.32 = 902.27/x
3. Step 3: Cross multiply
   1,123.40x = 1,549.32 × 902.27
4. Step 4: Simplify right side
   1,123.40x = 1,397,904.96
5. Step 5: Solve for x
   x = 1,397,904.96/1,123.40
6. Step 6: Final answer
   x = 1,244.35