Finding the Third Proportional to 109,659 and 239,149.50

Step by Step Solution

1. Step 1: Write the proportion equation
   109,659 : 239,149.50 = 239,149.50 : x
2. Step 2: Convert to fraction form
   109,659/239,149.50 = 239,149.50/x
3. Step 3: Cross multiply
   109,659x = 239,149.50 × 239,149.50
4. Step 4: Simplify right side
   109,659x = 57,192,483,350.25
5. Step 5: Solve for x
   x = 57,192,483,350.25/109,659
6. Step 6: Final answer
   x = 521,548.47