Finding the Third Proportional to 290,158 and 443,825

Step by Step Solution

1. Step 1: Write the proportion equation
   290,158 : 443,825 = 443,825 : x
2. Step 2: Convert to fraction form
   290,158/443,825 = 443,825/x
3. Step 3: Cross multiply
   290,158x = 443,825 × 443,825
4. Step 4: Simplify right side
   290,158x = 196,980,630,625
5. Step 5: Solve for x
   x = 196,980,630,625/290,158
6. Step 6: Final answer
   x = 678,873.68