Finding the Third Proportional to 154,521 and 320,884.50

Step by Step Solution

1. Step 1: Write the proportion equation
   154,521 : 320,884.50 = 320,884.50 : x
2. Step 2: Convert to fraction form
   154,521/320,884.50 = 320,884.50/x
3. Step 3: Cross multiply
   154,521x = 320,884.50 × 320,884.50
4. Step 4: Simplify right side
   154,521x = 102,966,862,340.25
5. Step 5: Solve for x
   x = 102,966,862,340.25/154,521
6. Step 6: Final answer
   x = 666,361.61