Finding the Third Proportional to 16,905.38 and 21,616.88

Step by Step Solution

1. Step 1: Write the proportion equation
   16,905.38 : 21,616.88 = 21,616.88 : x
2. Step 2: Convert to fraction form
   16,905.38/21,616.88 = 21,616.88/x
3. Step 3: Cross multiply
   16,905.38x = 21,616.88 × 21,616.88
4. Step 4: Simplify right side
   16,905.38x = 467,289,284.77
5. Step 5: Solve for x
   x = 467,289,284.77/16,905.38
6. Step 6: Final answer
   x = 27,641.46