Finding the Third Proportional to 291,057.75 and 636,222.38

Step by Step Solution

1. Step 1: Write the proportion equation
   291,057.75 : 636,222.38 = 636,222.38 : x
2. Step 2: Convert to fraction form
   291,057.75/636,222.38 = 636,222.38/x
3. Step 3: Cross multiply
   291,057.75x = 636,222.38 × 636,222.38
4. Step 4: Simplify right side
   291,057.75x = 404,778,910,450.64
5. Step 5: Solve for x
   x = 404,778,910,450.64/291,057.75
6. Step 6: Final answer
   x = 1,390,716.83