Finding the Third Proportional to 8,342.21 and 13,416.73

Step by Step Solution

1. Step 1: Write the proportion equation
   8,342.21 : 13,416.73 = 13,416.73 : x
2. Step 2: Convert to fraction form
   8,342.21/13,416.73 = 13,416.73/x
3. Step 3: Cross multiply
   8,342.21x = 13,416.73 × 13,416.73
4. Step 4: Simplify right side
   8,342.21x = 180,008,708.88
5. Step 5: Solve for x
   x = 180,008,708.88/8,342.21
6. Step 6: Final answer
   x = 21,578.06