Finding the Third Proportional to 200,809.50 and 322,860

Step by Step Solution

1. Step 1: Write the proportion equation
   200,809.50 : 322,860 = 322,860 : x
2. Step 2: Convert to fraction form
   200,809.50/322,860 = 322,860/x
3. Step 3: Cross multiply
   200,809.50x = 322,860 × 322,860
4. Step 4: Simplify right side
   200,809.50x = 104,238,579,600
5. Step 5: Solve for x
   x = 104,238,579,600/200,809.50
6. Step 6: Final answer
   x = 519,091.87