Finding the Third Proportional to 434,542 and 636,260

Step by Step Solution

1. Step 1: Write the proportion equation
   434,542 : 636,260 = 636,260 : x
2. Step 2: Convert to fraction form
   434,542/636,260 = 636,260/x
3. Step 3: Cross multiply
   434,542x = 636,260 × 636,260
4. Step 4: Simplify right side
   434,542x = 404,826,787,600
5. Step 5: Solve for x
   x = 404,826,787,600/434,542
6. Step 6: Final answer
   x = 931,617.17