Finding the Third Proportional to 13,878.50 and 20,450.25

Step by Step Solution

1. Step 1: Write the proportion equation
   13,878.50 : 20,450.25 = 20,450.25 : x
2. Step 2: Convert to fraction form
   13,878.50/20,450.25 = 20,450.25/x
3. Step 3: Cross multiply
   13,878.50x = 20,450.25 × 20,450.25
4. Step 4: Simplify right side
   13,878.50x = 418,212,725.06
5. Step 5: Solve for x
   x = 418,212,725.06/13,878.50
6. Step 6: Final answer
   x = 30,133.86