Finding the Third Proportional to 321,369 and 472,108.50

Step by Step Solution

1. Step 1: Write the proportion equation
   321,369 : 472,108.50 = 472,108.50 : x
2. Step 2: Convert to fraction form
   321,369/472,108.50 = 472,108.50/x
3. Step 3: Cross multiply
   321,369x = 472,108.50 × 472,108.50
4. Step 4: Simplify right side
   321,369x = 222,886,435,772.25
5. Step 5: Solve for x
   x = 222,886,435,772.25/321,369
6. Step 6: Final answer
   x = 693,553.01