Finding the Fourth Proportional to 1,123.89, 1,545.83 and 902.36

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123.89 : 1,545.83 = 902.36 : x
2. Step 2: Convert to fraction form
   1,123.89/1,545.83 = 902.36/x
3. Step 3: Cross multiply
   1,123.89x = 1,545.83 × 902.36
4. Step 4: Simplify right side
   1,123.89x = 1,394,882.92
5. Step 5: Solve for x
   x = 1,394,882.92/1,123.89
6. Step 6: Final answer
   x = 1,241.12