Finding the Third Proportional to 290,174 and 443,601

Step by Step Solution

1. Step 1: Write the proportion equation
   290,174 : 443,601 = 443,601 : x
2. Step 2: Convert to fraction form
   290,174/443,601 = 443,601/x
3. Step 3: Cross multiply
   290,174x = 443,601 × 443,601
4. Step 4: Simplify right side
   290,174x = 196,781,847,201
5. Step 5: Solve for x
   x = 196,781,847,201/290,174
6. Step 6: Final answer
   x = 678,151.20