Finding the Third Proportional to 109,212 and 239,458.50

Step by Step Solution

1. Step 1: Write the proportion equation
   109,212 : 239,458.50 = 239,458.50 : x
2. Step 2: Convert to fraction form
   109,212/239,458.50 = 239,458.50/x
3. Step 3: Cross multiply
   109,212x = 239,458.50 × 239,458.50
4. Step 4: Simplify right side
   109,212x = 57,340,373,222.25
5. Step 5: Solve for x
   x = 57,340,373,222.25/109,212
6. Step 6: Final answer
   x = 525,037.30