Finding the Third Proportional to 291,313 and 443,051

Step by Step Solution

1. Step 1: Write the proportion equation
   291,313 : 443,051 = 443,051 : x
2. Step 2: Convert to fraction form
   291,313/443,051 = 443,051/x
3. Step 3: Cross multiply
   291,313x = 443,051 × 443,051
4. Step 4: Simplify right side
   291,313x = 196,294,188,601
5. Step 5: Solve for x
   x = 196,294,188,601/291,313
6. Step 6: Final answer
   x = 673,825.71