Finding the Third Proportional to 15,997.50 and 21,404.25

Step by Step Solution

1. Step 1: Write the proportion equation
   15,997.50 : 21,404.25 = 21,404.25 : x
2. Step 2: Convert to fraction form
   15,997.50/21,404.25 = 21,404.25/x
3. Step 3: Cross multiply
   15,997.50x = 21,404.25 × 21,404.25
4. Step 4: Simplify right side
   15,997.50x = 458,141,918.06
5. Step 5: Solve for x
   x = 458,141,918.06/15,997.50
6. Step 6: Final answer
   x = 28,638.34