Finding the Third Proportional to 320,592.75 and 498,390

Step by Step Solution

1. Step 1: Write the proportion equation
   320,592.75 : 498,390 = 498,390 : x
2. Step 2: Convert to fraction form
   320,592.75/498,390 = 498,390/x
3. Step 3: Cross multiply
   320,592.75x = 498,390 × 498,390
4. Step 4: Simplify right side
   320,592.75x = 248,392,592,100
5. Step 5: Solve for x
   x = 248,392,592,100/320,592.75
6. Step 6: Final answer
   x = 774,791.67