Finding the Third Proportional to 12,953 and 21,204

Step by Step Solution

1. Step 1: Write the proportion equation
   12,953 : 21,204 = 21,204 : x
2. Step 2: Convert to fraction form
   12,953/21,204 = 21,204/x
3. Step 3: Cross multiply
   12,953x = 21,204 × 21,204
4. Step 4: Simplify right side
   12,953x = 449,609,616
5. Step 5: Solve for x
   x = 449,609,616/12,953
6. Step 6: Final answer
   x = 34,710.85