Finding the Third Proportional to 21,623 and 29,123

Step by Step Solution

1. Step 1: Write the proportion equation
   21,623 : 29,123 = 29,123 : x
2. Step 2: Convert to fraction form
   21,623/29,123 = 29,123/x
3. Step 3: Cross multiply
   21,623x = 29,123 × 29,123
4. Step 4: Simplify right side
   21,623x = 848,149,129
5. Step 5: Solve for x
   x = 848,149,129/21,623
6. Step 6: Final answer
   x = 39,224.40