Finding the Third Proportional to 243,192 and 498,408

Step by Step Solution

1. Step 1: Write the proportion equation
   243,192 : 498,408 = 498,408 : x
2. Step 2: Convert to fraction form
   243,192/498,408 = 498,408/x
3. Step 3: Cross multiply
   243,192x = 498,408 × 498,408
4. Step 4: Simplify right side
   243,192x = 248,410,534,464
5. Step 5: Solve for x
   x = 248,410,534,464/243,192
6. Step 6: Final answer
   x = 1,021,458.50