Finding the Third Proportional to 422,057 and 604,581.50

Step by Step Solution

1. Step 1: Write the proportion equation
   422,057 : 604,581.50 = 604,581.50 : x
2. Step 2: Convert to fraction form
   422,057/604,581.50 = 604,581.50/x
3. Step 3: Cross multiply
   422,057x = 604,581.50 × 604,581.50
4. Step 4: Simplify right side
   422,057x = 365,518,790,142.25
5. Step 5: Solve for x
   x = 365,518,790,142.25/422,057
6. Step 6: Final answer
   x = 866,041.29