Finding the Third Proportional to 12,456 and 19,808

Step by Step Solution

1. Step 1: Write the proportion equation
   12,456 : 19,808 = 19,808 : x
2. Step 2: Convert to fraction form
   12,456/19,808 = 19,808/x
3. Step 3: Cross multiply
   12,456x = 19,808 × 19,808
4. Step 4: Simplify right side
   12,456x = 392,356,864
5. Step 5: Solve for x
   x = 392,356,864/12,456
6. Step 6: Final answer
   x = 31,499.43