Finding the Third Proportional to 210,789 and 323,959.50

Step by Step Solution

1. Step 1: Write the proportion equation
   210,789 : 323,959.50 = 323,959.50 : x
2. Step 2: Convert to fraction form
   210,789/323,959.50 = 323,959.50/x
3. Step 3: Cross multiply
   210,789x = 323,959.50 × 323,959.50
4. Step 4: Simplify right side
   210,789x = 104,949,757,640.25
5. Step 5: Solve for x
   x = 104,949,757,640.25/210,789
6. Step 6: Final answer
   x = 497,890.11