Finding the Third Proportional to 12,440.25 and 16,455.38

Step by Step Solution

1. Step 1: Write the proportion equation
   12,440.25 : 16,455.38 = 16,455.38 : x
2. Step 2: Convert to fraction form
   12,440.25/16,455.38 = 16,455.38/x
3. Step 3: Cross multiply
   12,440.25x = 16,455.38 × 16,455.38
4. Step 4: Simplify right side
   12,440.25x = 270,779,366.39
5. Step 5: Solve for x
   x = 270,779,366.39/12,440.25
6. Step 6: Final answer
   x = 21,766.39