Finding the Third Proportional to 16,209 and 21,903

Step by Step Solution

1. Step 1: Write the proportion equation
   16,209 : 21,903 = 21,903 : x
2. Step 2: Convert to fraction form
   16,209/21,903 = 21,903/x
3. Step 3: Cross multiply
   16,209x = 21,903 × 21,903
4. Step 4: Simplify right side
   16,209x = 479,741,409
5. Step 5: Solve for x
   x = 479,741,409/16,209
6. Step 6: Final answer
   x = 29,597.22