Finding the Third Proportional to 417,849 and 636,568.50

Step by Step Solution

1. Step 1: Write the proportion equation
   417,849 : 636,568.50 = 636,568.50 : x
2. Step 2: Convert to fraction form
   417,849/636,568.50 = 636,568.50/x
3. Step 3: Cross multiply
   417,849x = 636,568.50 × 636,568.50
4. Step 4: Simplify right side
   417,849x = 405,219,455,192.25
5. Step 5: Solve for x
   x = 405,219,455,192.25/417,849
6. Step 6: Final answer
   x = 969,774.86