Finding the Third Proportional to 417,829 and 636,535.50

Step by Step Solution

1. Step 1: Write the proportion equation
   417,829 : 636,535.50 = 636,535.50 : x
2. Step 2: Convert to fraction form
   417,829/636,535.50 = 636,535.50/x
3. Step 3: Cross multiply
   417,829x = 636,535.50 × 636,535.50
4. Step 4: Simplify right side
   417,829x = 405,177,442,760.25
5. Step 5: Solve for x
   x = 405,177,442,760.25/417,829
6. Step 6: Final answer
   x = 969,720.73