Finding the Third Proportional to 111,555 and 245,349

Step by Step Solution

1. Step 1: Write the proportion equation
   111,555 : 245,349 = 245,349 : x
2. Step 2: Convert to fraction form
   111,555/245,349 = 245,349/x
3. Step 3: Cross multiply
   111,555x = 245,349 × 245,349
4. Step 4: Simplify right side
   111,555x = 60,196,131,801
5. Step 5: Solve for x
   x = 60,196,131,801/111,555
6. Step 6: Final answer
   x = 539,609.45