Finding the Third Proportional to 12,456 and 17,708

Step by Step Solution

1. Step 1: Write the proportion equation
   12,456 : 17,708 = 17,708 : x
2. Step 2: Convert to fraction form
   12,456/17,708 = 17,708/x
3. Step 3: Cross multiply
   12,456x = 17,708 × 17,708
4. Step 4: Simplify right side
   12,456x = 313,573,264
5. Step 5: Solve for x
   x = 313,573,264/12,456
6. Step 6: Final answer
   x = 25,174.48