Finding the Third Proportional to 111,912 and 240,388.50

Step by Step Solution

1. Step 1: Write the proportion equation
   111,912 : 240,388.50 = 240,388.50 : x
2. Step 2: Convert to fraction form
   111,912/240,388.50 = 240,388.50/x
3. Step 3: Cross multiply
   111,912x = 240,388.50 × 240,388.50
4. Step 4: Simplify right side
   111,912x = 57,786,630,932.25
5. Step 5: Solve for x
   x = 57,786,630,932.25/111,912
6. Step 6: Final answer
   x = 516,357.77