Finding the Third Proportional to 332,638 and 521,210.50

Step by Step Solution

1. Step 1: Write the proportion equation
   332,638 : 521,210.50 = 521,210.50 : x
2. Step 2: Convert to fraction form
   332,638/521,210.50 = 521,210.50/x
3. Step 3: Cross multiply
   332,638x = 521,210.50 × 521,210.50
4. Step 4: Simplify right side
   332,638x = 271,660,385,310.25
5. Step 5: Solve for x
   x = 271,660,385,310.25/332,638
6. Step 6: Final answer
   x = 816,684.76