Finding the Third Proportional to 320,449.50 and 498,168

Step by Step Solution

1. Step 1: Write the proportion equation
   320,449.50 : 498,168 = 498,168 : x
2. Step 2: Convert to fraction form
   320,449.50/498,168 = 498,168/x
3. Step 3: Cross multiply
   320,449.50x = 498,168 × 498,168
4. Step 4: Simplify right side
   320,449.50x = 248,171,356,224
5. Step 5: Solve for x
   x = 248,171,356,224/320,449.50
6. Step 6: Final answer
   x = 774,447.63