Finding the Third Proportional to 210,207 and 323,086.50

Step by Step Solution

1. Step 1: Write the proportion equation
   210,207 : 323,086.50 = 323,086.50 : x
2. Step 2: Convert to fraction form
   210,207/323,086.50 = 323,086.50/x
3. Step 3: Cross multiply
   210,207x = 323,086.50 × 323,086.50
4. Step 4: Simplify right side
   210,207x = 104,384,886,482.25
5. Step 5: Solve for x
   x = 104,384,886,482.25/210,207
6. Step 6: Final answer
   x = 496,581.40