Finding the Third Proportional to 21,725.72 and 30,990.09

Step by Step Solution

1. Step 1: Write the proportion equation
   21,725.72 : 30,990.09 = 30,990.09 : x
2. Step 2: Convert to fraction form
   21,725.72/30,990.09 = 30,990.09/x
3. Step 3: Cross multiply
   21,725.72x = 30,990.09 × 30,990.09
4. Step 4: Simplify right side
   21,725.72x = 960,385,910.63
5. Step 5: Solve for x
   x = 960,385,910.63/21,725.72
6. Step 6: Final answer
   x = 44,205.02