Finding the Third Proportional to 332,642 and 521,215.50

Step by Step Solution

1. Step 1: Write the proportion equation
   332,642 : 521,215.50 = 521,215.50 : x
2. Step 2: Convert to fraction form
   332,642/521,215.50 = 521,215.50/x
3. Step 3: Cross multiply
   332,642x = 521,215.50 × 521,215.50
4. Step 4: Simplify right side
   332,642x = 271,665,597,440.25
5. Step 5: Solve for x
   x = 271,665,597,440.25/332,642
6. Step 6: Final answer
   x = 816,690.61