Finding the Third Proportional to 111,573 and 245,259

Step by Step Solution

1. Step 1: Write the proportion equation
   111,573 : 245,259 = 245,259 : x
2. Step 2: Convert to fraction form
   111,573/245,259 = 245,259/x
3. Step 3: Cross multiply
   111,573x = 245,259 × 245,259
4. Step 4: Simplify right side
   111,573x = 60,151,977,081
5. Step 5: Solve for x
   x = 60,151,977,081/111,573
6. Step 6: Final answer
   x = 539,126.64