Finding the Third Proportional to 221,392 and 332,128.50

Step by Step Solution

1. Step 1: Write the proportion equation
   221,392 : 332,128.50 = 332,128.50 : x
2. Step 2: Convert to fraction form
   221,392/332,128.50 = 332,128.50/x
3. Step 3: Cross multiply
   221,392x = 332,128.50 × 332,128.50
4. Step 4: Simplify right side
   221,392x = 110,309,340,512.25
5. Step 5: Solve for x
   x = 110,309,340,512.25/221,392
6. Step 6: Final answer
   x = 498,253.51