Finding the Third Proportional to 250,892 and 542,678

Step by Step Solution

1. Step 1: Write the proportion equation
   250,892 : 542,678 = 542,678 : x
2. Step 2: Convert to fraction form
   250,892/542,678 = 542,678/x
3. Step 3: Cross multiply
   250,892x = 542,678 × 542,678
4. Step 4: Simplify right side
   250,892x = 294,499,411,684
5. Step 5: Solve for x
   x = 294,499,411,684/250,892
6. Step 6: Final answer
   x = 1,173,809.49