Finding the Third Proportional to 332,636 and 521,207.50

Step by Step Solution

1. Step 1: Write the proportion equation
   332,636 : 521,207.50 = 521,207.50 : x
2. Step 2: Convert to fraction form
   332,636/521,207.50 = 521,207.50/x
3. Step 3: Cross multiply
   332,636x = 521,207.50 × 521,207.50
4. Step 4: Simplify right side
   332,636x = 271,657,258,056.25
5. Step 5: Solve for x
   x = 271,657,258,056.25/332,636
6. Step 6: Final answer
   x = 816,680.27