Finding the Third Proportional to 18,123.75 and 21,890.25

Step by Step Solution

1. Step 1: Write the proportion equation
   18,123.75 : 21,890.25 = 21,890.25 : x
2. Step 2: Convert to fraction form
   18,123.75/21,890.25 = 21,890.25/x
3. Step 3: Cross multiply
   18,123.75x = 21,890.25 × 21,890.25
4. Step 4: Simplify right side
   18,123.75x = 479,183,045.06
5. Step 5: Solve for x
   x = 479,183,045.06/18,123.75
6. Step 6: Final answer
   x = 26,439.51