Finding the Third Proportional to 3,398.20 and 7,423.84

Step by Step Solution

1. Step 1: Write the proportion equation
   3,398.20 : 7,423.84 = 7,423.84 : x
2. Step 2: Convert to fraction form
   3,398.20/7,423.84 = 7,423.84/x
3. Step 3: Cross multiply
   3,398.20x = 7,423.84 × 7,423.84
4. Step 4: Simplify right side
   3,398.20x = 55,113,398.03
5. Step 5: Solve for x
   x = 55,113,398.03/3,398.20
6. Step 6: Final answer
   x = 16,218.39