Finding the Third Proportional to 56,718 and 123,648

Step by Step Solution

1. Step 1: Write the proportion equation
   56,718 : 123,648 = 123,648 : x
2. Step 2: Convert to fraction form
   56,718/123,648 = 123,648/x
3. Step 3: Cross multiply
   56,718x = 123,648 × 123,648
4. Step 4: Simplify right side
   56,718x = 15,288,827,904
5. Step 5: Solve for x
   x = 15,288,827,904/56,718
6. Step 6: Final answer
   x = 269,558.66