Finding the Fourth Proportional to 2,604.54, 3,906.69 and 938.70

Step by Step Solution

1. Step 1: Write the proportion equation
   2,604.54 : 3,906.69 = 938.70 : x
2. Step 2: Convert to fraction form
   2,604.54/3,906.69 = 938.70/x
3. Step 3: Cross multiply
   2,604.54x = 3,906.69 × 938.70
4. Step 4: Simplify right side
   2,604.54x = 3,667,209.90
5. Step 5: Solve for x
   x = 3,667,209.90/2,604.54
6. Step 6: Final answer
   x = 1,408.01