Finding the Third Proportional to 13,878.84 and 18,813.09

Step by Step Solution

1. Step 1: Write the proportion equation
   13,878.84 : 18,813.09 = 18,813.09 : x
2. Step 2: Convert to fraction form
   13,878.84/18,813.09 = 18,813.09/x
3. Step 3: Cross multiply
   13,878.84x = 18,813.09 × 18,813.09
4. Step 4: Simplify right side
   13,878.84x = 353,932,496.45
5. Step 5: Solve for x
   x = 353,932,496.45/13,878.84
6. Step 6: Final answer
   x = 25,501.58