Finding the Third Proportional to 21,757 and 29,139

Step by Step Solution

1. Step 1: Write the proportion equation
   21,757 : 29,139 = 29,139 : x
2. Step 2: Convert to fraction form
   21,757/29,139 = 29,139/x
3. Step 3: Cross multiply
   21,757x = 29,139 × 29,139
4. Step 4: Simplify right side
   21,757x = 849,081,321
5. Step 5: Solve for x
   x = 849,081,321/21,757
6. Step 6: Final answer
   x = 39,025.66