Finding the Fourth Proportional to 3,970.79, 5,479.59 and 2,269.37

Step by Step Solution

1. Step 1: Write the proportion equation
   3,970.79 : 5,479.59 = 2,269.37 : x
2. Step 2: Convert to fraction form
   3,970.79/5,479.59 = 2,269.37/x
3. Step 3: Cross multiply
   3,970.79x = 5,479.59 × 2,269.37
4. Step 4: Simplify right side
   3,970.79x = 12,435,239.37
5. Step 5: Solve for x
   x = 12,435,239.37/3,970.79
6. Step 6: Final answer
   x = 3,131.68