Finding the Fourth Proportional to 3,860.38, 5,790.52 and 938.69

Step by Step Solution

1. Step 1: Write the proportion equation
   3,860.38 : 5,790.52 = 938.69 : x
2. Step 2: Convert to fraction form
   3,860.38/5,790.52 = 938.69/x
3. Step 3: Cross multiply
   3,860.38x = 5,790.52 × 938.69
4. Step 4: Simplify right side
   3,860.38x = 5,435,503.22
5. Step 5: Solve for x
   x = 5,435,503.22/3,860.38
6. Step 6: Final answer
   x = 1,408.02