Finding the Third Proportional to 154,524 and 320,890

Step by Step Solution

1. Step 1: Write the proportion equation
   154,524 : 320,890 = 320,890 : x
2. Step 2: Convert to fraction form
   154,524/320,890 = 320,890/x
3. Step 3: Cross multiply
   154,524x = 320,890 × 320,890
4. Step 4: Simplify right side
   154,524x = 102,970,392,100
5. Step 5: Solve for x
   x = 102,970,392,100/154,524
6. Step 6: Final answer
   x = 666,371.52