Finding the Third Proportional to 21,409.31 and 22,890.09

Step by Step Solution

1. Step 1: Write the proportion equation
   21,409.31 : 22,890.09 = 22,890.09 : x
2. Step 2: Convert to fraction form
   21,409.31/22,890.09 = 22,890.09/x
3. Step 3: Cross multiply
   21,409.31x = 22,890.09 × 22,890.09
4. Step 4: Simplify right side
   21,409.31x = 523,956,391.88
5. Step 5: Solve for x
   x = 523,956,391.88/21,409.31
6. Step 6: Final answer
   x = 24,473.29