Finding the Third Proportional to 111,580 and 245,336

Step by Step Solution

1. Step 1: Write the proportion equation
   111,580 : 245,336 = 245,336 : x
2. Step 2: Convert to fraction form
   111,580/245,336 = 245,336/x
3. Step 3: Cross multiply
   111,580x = 245,336 × 245,336
4. Step 4: Simplify right side
   111,580x = 60,189,752,896
5. Step 5: Solve for x
   x = 60,189,752,896/111,580
6. Step 6: Final answer
   x = 539,431.38