Finding the Third Proportional to 210,773 and 321,411.50

Step by Step Solution

1. Step 1: Write the proportion equation
   210,773 : 321,411.50 = 321,411.50 : x
2. Step 2: Convert to fraction form
   210,773/321,411.50 = 321,411.50/x
3. Step 3: Cross multiply
   210,773x = 321,411.50 × 321,411.50
4. Step 4: Simplify right side
   210,773x = 103,305,352,332.25
5. Step 5: Solve for x
   x = 103,305,352,332.25/210,773
6. Step 6: Final answer
   x = 490,126.12