Finding the Third Proportional to 154,522 and 320,886.50

Step by Step Solution

1. Step 1: Write the proportion equation
   154,522 : 320,886.50 = 320,886.50 : x
2. Step 2: Convert to fraction form
   154,522/320,886.50 = 320,886.50/x
3. Step 3: Cross multiply
   154,522x = 320,886.50 × 320,886.50
4. Step 4: Simplify right side
   154,522x = 102,968,145,882.25
5. Step 5: Solve for x
   x = 102,968,145,882.25/154,522
6. Step 6: Final answer
   x = 666,365.60