Finding the Fourth Proportional to 3,861.38, 5,792.02 and 939.69

Step by Step Solution

1. Step 1: Write the proportion equation
   3,861.38 : 5,792.02 = 939.69 : x
2. Step 2: Convert to fraction form
   3,861.38/5,792.02 = 939.69/x
3. Step 3: Cross multiply
   3,861.38x = 5,792.02 × 939.69
4. Step 4: Simplify right side
   3,861.38x = 5,442,703.27
5. Step 5: Solve for x
   x = 5,442,703.27/3,861.38
6. Step 6: Final answer
   x = 1,409.52