Finding the Third Proportional to 111,561 and 245,165

Step by Step Solution

1. Step 1: Write the proportion equation
   111,561 : 245,165 = 245,165 : x
2. Step 2: Convert to fraction form
   111,561/245,165 = 245,165/x
3. Step 3: Cross multiply
   111,561x = 245,165 × 245,165
4. Step 4: Simplify right side
   111,561x = 60,105,877,225
5. Step 5: Solve for x
   x = 60,105,877,225/111,561
6. Step 6: Final answer
   x = 538,771.41