Finding the Third Proportional to 15,390 and 25,488

Step by Step Solution

1. Step 1: Write the proportion equation
   15,390 : 25,488 = 25,488 : x
2. Step 2: Convert to fraction form
   15,390/25,488 = 25,488/x
3. Step 3: Cross multiply
   15,390x = 25,488 × 25,488
4. Step 4: Simplify right side
   15,390x = 649,638,144
5. Step 5: Solve for x
   x = 649,638,144/15,390
6. Step 6: Final answer
   x = 42,211.71