Finding the Third Proportional to 111,408 and 240,570

Step by Step Solution

1. Step 1: Write the proportion equation
   111,408 : 240,570 = 240,570 : x
2. Step 2: Convert to fraction form
   111,408/240,570 = 240,570/x
3. Step 3: Cross multiply
   111,408x = 240,570 × 240,570
4. Step 4: Simplify right side
   111,408x = 57,873,924,900
5. Step 5: Solve for x
   x = 57,873,924,900/111,408
6. Step 6: Final answer
   x = 519,477.28