Finding the Third Proportional to 155,514 and 320,842.50

Step by Step Solution

1. Step 1: Write the proportion equation
   155,514 : 320,842.50 = 320,842.50 : x
2. Step 2: Convert to fraction form
   155,514/320,842.50 = 320,842.50/x
3. Step 3: Cross multiply
   155,514x = 320,842.50 × 320,842.50
4. Step 4: Simplify right side
   155,514x = 102,939,909,806.25
5. Step 5: Solve for x
   x = 102,939,909,806.25/155,514
6. Step 6: Final answer
   x = 661,933.39