Finding the Third Proportional to 207,621 and 320,773.50

Step by Step Solution

1. Step 1: Write the proportion equation
   207,621 : 320,773.50 = 320,773.50 : x
2. Step 2: Convert to fraction form
   207,621/320,773.50 = 320,773.50/x
3. Step 3: Cross multiply
   207,621x = 320,773.50 × 320,773.50
4. Step 4: Simplify right side
   207,621x = 102,895,638,302.25
5. Step 5: Solve for x
   x = 102,895,638,302.25/207,621
6. Step 6: Final answer
   x = 495,593.60