Finding the Third Proportional to 268,317 and 363,109.50

Step by Step Solution

1. Step 1: Write the proportion equation
   268,317 : 363,109.50 = 363,109.50 : x
2. Step 2: Convert to fraction form
   268,317/363,109.50 = 363,109.50/x
3. Step 3: Cross multiply
   268,317x = 363,109.50 × 363,109.50
4. Step 4: Simplify right side
   268,317x = 131,848,508,990.25
5. Step 5: Solve for x
   x = 131,848,508,990.25/268,317
6. Step 6: Final answer
   x = 491,390.81