Finding the Third Proportional to 434,517 and 636,222

Step by Step Solution

1. Step 1: Write the proportion equation
   434,517 : 636,222 = 636,222 : x
2. Step 2: Convert to fraction form
   434,517/636,222 = 636,222/x
3. Step 3: Cross multiply
   434,517x = 636,222 × 636,222
4. Step 4: Simplify right side
   434,517x = 404,778,433,284
5. Step 5: Solve for x
   x = 404,778,433,284/434,517
6. Step 6: Final answer
   x = 931,559.49