Finding the Third Proportional to 111,909 and 240,382.50

Step by Step Solution

1. Step 1: Write the proportion equation
   111,909 : 240,382.50 = 240,382.50 : x
2. Step 2: Convert to fraction form
   111,909/240,382.50 = 240,382.50/x
3. Step 3: Cross multiply
   111,909x = 240,382.50 × 240,382.50
4. Step 4: Simplify right side
   111,909x = 57,783,746,306.25
5. Step 5: Solve for x
   x = 57,783,746,306.25/111,909
6. Step 6: Final answer
   x = 516,345.84