Finding the Third Proportional to 111,285 and 240,389

Step by Step Solution

1. Step 1: Write the proportion equation
   111,285 : 240,389 = 240,389 : x
2. Step 2: Convert to fraction form
   111,285/240,389 = 240,389/x
3. Step 3: Cross multiply
   111,285x = 240,389 × 240,389
4. Step 4: Simplify right side
   111,285x = 57,786,871,321
5. Step 5: Solve for x
   x = 57,786,871,321/111,285
6. Step 6: Final answer
   x = 519,269.19