Finding the Third Proportional to 123,039 and 189,999

Step by Step Solution

1. Step 1: Write the proportion equation
   123,039 : 189,999 = 189,999 : x
2. Step 2: Convert to fraction form
   123,039/189,999 = 189,999/x
3. Step 3: Cross multiply
   123,039x = 189,999 × 189,999
4. Step 4: Simplify right side
   123,039x = 36,099,620,001
5. Step 5: Solve for x
   x = 36,099,620,001/123,039
6. Step 6: Final answer
   x = 293,399.82