Finding the Third Proportional to 3,891.59 and 8,398.27

Step by Step Solution

1. Step 1: Write the proportion equation
   3,891.59 : 8,398.27 = 8,398.27 : x
2. Step 2: Convert to fraction form
   3,891.59/8,398.27 = 8,398.27/x
3. Step 3: Cross multiply
   3,891.59x = 8,398.27 × 8,398.27
4. Step 4: Simplify right side
   3,891.59x = 70,530,976.23
5. Step 5: Solve for x
   x = 70,530,976.23/3,891.59
6. Step 6: Final answer
   x = 18,123.95