Finding the Third Proportional to 111,456 and 240,408

Step by Step Solution

1. Step 1: Write the proportion equation
   111,456 : 240,408 = 240,408 : x
2. Step 2: Convert to fraction form
   111,456/240,408 = 240,408/x
3. Step 3: Cross multiply
   111,456x = 240,408 × 240,408
4. Step 4: Simplify right side
   111,456x = 57,796,006,464
5. Step 5: Solve for x
   x = 57,796,006,464/111,456
6. Step 6: Final answer
   x = 518,554.47