Finding the Third Proportional to 248,885 and 542,978

Step by Step Solution

1. Step 1: Write the proportion equation
   248,885 : 542,978 = 542,978 : x
2. Step 2: Convert to fraction form
   248,885/542,978 = 542,978/x
3. Step 3: Cross multiply
   248,885x = 542,978 × 542,978
4. Step 4: Simplify right side
   248,885x = 294,825,108,484
5. Step 5: Solve for x
   x = 294,825,108,484/248,885
6. Step 6: Final answer
   x = 1,184,583.68