Finding the Fourth Proportional to 3,404.30, 5,105.84 and 938.79

Step by Step Solution

1. Step 1: Write the proportion equation
   3,404.30 : 5,105.84 = 938.79 : x
2. Step 2: Convert to fraction form
   3,404.30/5,105.84 = 938.79/x
3. Step 3: Cross multiply
   3,404.30x = 5,105.84 × 938.79
4. Step 4: Simplify right side
   3,404.30x = 4,793,306.84
5. Step 5: Solve for x
   x = 4,793,306.84/3,404.30
6. Step 6: Final answer
   x = 1,408.02