Finding the Third Proportional to 21,726 and 25,290

Step by Step Solution

1. Step 1: Write the proportion equation
   21,726 : 25,290 = 25,290 : x
2. Step 2: Convert to fraction form
   21,726/25,290 = 25,290/x
3. Step 3: Cross multiply
   21,726x = 25,290 × 25,290
4. Step 4: Simplify right side
   21,726x = 639,584,100
5. Step 5: Solve for x
   x = 639,584,100/21,726
6. Step 6: Final answer
   x = 29,438.65