Finding the Fourth Proportional to 5,279.94, 7,279.69 and 3,388.18

Step by Step Solution

1. Step 1: Write the proportion equation
   5,279.94 : 7,279.69 = 3,388.18 : x
2. Step 2: Convert to fraction form
   5,279.94/7,279.69 = 3,388.18/x
3. Step 3: Cross multiply
   5,279.94x = 7,279.69 × 3,388.18
4. Step 4: Simplify right side
   5,279.94x = 24,664,891.59
5. Step 5: Solve for x
   x = 24,664,891.59/5,279.94
6. Step 6: Final answer
   x = 4,671.44