Finding the Third Proportional to 111,615.75 and 240,727.50

Step by Step Solution

1. Step 1: Write the proportion equation
   111,615.75 : 240,727.50 = 240,727.50 : x
2. Step 2: Convert to fraction form
   111,615.75/240,727.50 = 240,727.50/x
3. Step 3: Cross multiply
   111,615.75x = 240,727.50 × 240,727.50
4. Step 4: Simplify right side
   111,615.75x = 57,949,729,256.25
5. Step 5: Solve for x
   x = 57,949,729,256.25/111,615.75
6. Step 6: Final answer
   x = 519,189.53