Finding the Third Proportional to 8,403.75 and 12,818.25

Step by Step Solution

1. Step 1: Write the proportion equation
   8,403.75 : 12,818.25 = 12,818.25 : x
2. Step 2: Convert to fraction form
   8,403.75/12,818.25 = 12,818.25/x
3. Step 3: Cross multiply
   8,403.75x = 12,818.25 × 12,818.25
4. Step 4: Simplify right side
   8,403.75x = 164,307,533.06
5. Step 5: Solve for x
   x = 164,307,533.06/8,403.75
6. Step 6: Final answer
   x = 19,551.69