Finding the Third Proportional to 311,987.25 and 445,836

Step by Step Solution

1. Step 1: Write the proportion equation
   311,987.25 : 445,836 = 445,836 : x
2. Step 2: Convert to fraction form
   311,987.25/445,836 = 445,836/x
3. Step 3: Cross multiply
   311,987.25x = 445,836 × 445,836
4. Step 4: Simplify right side
   311,987.25x = 198,769,738,896
5. Step 5: Solve for x
   x = 198,769,738,896/311,987.25
6. Step 6: Final answer
   x = 637,108.53