Finding the Third Proportional to 111,680.50 and 240,855.75

Step by Step Solution

1. Step 1: Write the proportion equation
   111,680.50 : 240,855.75 = 240,855.75 : x
2. Step 2: Convert to fraction form
   111,680.50/240,855.75 = 240,855.75/x
3. Step 3: Cross multiply
   111,680.50x = 240,855.75 × 240,855.75
4. Step 4: Simplify right side
   111,680.50x = 58,011,492,308.06
5. Step 5: Solve for x
   x = 58,011,492,308.06/111,680.50
6. Step 6: Final answer
   x = 519,441.55