Finding the Third Proportional to 8,420.06 and 13,222.69

Step by Step Solution

1. Step 1: Write the proportion equation
   8,420.06 : 13,222.69 = 13,222.69 : x
2. Step 2: Convert to fraction form
   8,420.06/13,222.69 = 13,222.69/x
3. Step 3: Cross multiply
   8,420.06x = 13,222.69 × 13,222.69
4. Step 4: Simplify right side
   8,420.06x = 174,839,464.72
5. Step 5: Solve for x
   x = 174,839,464.72/8,420.06
6. Step 6: Final answer
   x = 20,764.63