Finding the Third Proportional to 111,918 and 240,400.50

Step by Step Solution

1. Step 1: Write the proportion equation
   111,918 : 240,400.50 = 240,400.50 : x
2. Step 2: Convert to fraction form
   111,918/240,400.50 = 240,400.50/x
3. Step 3: Cross multiply
   111,918x = 240,400.50 × 240,400.50
4. Step 4: Simplify right side
   111,918x = 57,792,400,400.25
5. Step 5: Solve for x
   x = 57,792,400,400.25/111,918
6. Step 6: Final answer
   x = 516,381.64