Finding the Third Proportional to 604,399 and 821,322.50

Step by Step Solution

1. Step 1: Write the proportion equation
   604,399 : 821,322.50 = 821,322.50 : x
2. Step 2: Convert to fraction form
   604,399/821,322.50 = 821,322.50/x
3. Step 3: Cross multiply
   604,399x = 821,322.50 × 821,322.50
4. Step 4: Simplify right side
   604,399x = 674,570,649,006.25
5. Step 5: Solve for x
   x = 674,570,649,006.25/604,399
6. Step 6: Final answer
   x = 1,116,101.53