Finding the Third Proportional to 56,443 and 123,379

Step by Step Solution

1. Step 1: Write the proportion equation
   56,443 : 123,379 = 123,379 : x
2. Step 2: Convert to fraction form
   56,443/123,379 = 123,379/x
3. Step 3: Cross multiply
   56,443x = 123,379 × 123,379
4. Step 4: Simplify right side
   56,443x = 15,222,377,641
5. Step 5: Solve for x
   x = 15,222,377,641/56,443
6. Step 6: Final answer
   x = 269,694.69