Finding the Third Proportional to 208,356 and 321,180

Step by Step Solution

1. Step 1: Write the proportion equation
   208,356 : 321,180 = 321,180 : x
2. Step 2: Convert to fraction form
   208,356/321,180 = 321,180/x
3. Step 3: Cross multiply
   208,356x = 321,180 × 321,180
4. Step 4: Simplify right side
   208,356x = 103,156,592,400
5. Step 5: Solve for x
   x = 103,156,592,400/208,356
6. Step 6: Final answer
   x = 495,097.78