Finding the Third Proportional to 16,121.63 and 21,501.38

Step by Step Solution

1. Step 1: Write the proportion equation
   16,121.63 : 21,501.38 = 21,501.38 : x
2. Step 2: Convert to fraction form
   16,121.63/21,501.38 = 21,501.38/x
3. Step 3: Cross multiply
   16,121.63x = 21,501.38 × 21,501.38
4. Step 4: Simplify right side
   16,121.63x = 462,309,126.89
5. Step 5: Solve for x
   x = 462,309,126.89/16,121.63
6. Step 6: Final answer
   x = 28,676.34