Finding the Third Proportional to 290,466 and 443,313

Step by Step Solution

1. Step 1: Write the proportion equation
   290,466 : 443,313 = 443,313 : x
2. Step 2: Convert to fraction form
   290,466/443,313 = 443,313/x
3. Step 3: Cross multiply
   290,466x = 443,313 × 443,313
4. Step 4: Simplify right side
   290,466x = 196,526,415,969
5. Step 5: Solve for x
   x = 196,526,415,969/290,466
6. Step 6: Final answer
   x = 676,590.09