Finding the Third Proportional to 604,403 and 821,328.50

Step by Step Solution

1. Step 1: Write the proportion equation
   604,403 : 821,328.50 = 821,328.50 : x
2. Step 2: Convert to fraction form
   604,403/821,328.50 = 821,328.50/x
3. Step 3: Cross multiply
   604,403x = 821,328.50 × 821,328.50
4. Step 4: Simplify right side
   604,403x = 674,580,504,912.25
5. Step 5: Solve for x
   x = 674,580,504,912.25/604,403
6. Step 6: Final answer
   x = 1,116,110.45