Finding the Third Proportional to 290,304 and 448,401.38

Step by Step Solution

1. Step 1: Write the proportion equation
   290,304 : 448,401.38 = 448,401.38 : x
2. Step 2: Convert to fraction form
   290,304/448,401.38 = 448,401.38/x
3. Step 3: Cross multiply
   290,304x = 448,401.38 × 448,401.38
4. Step 4: Simplify right side
   290,304x = 201,063,793,101.89
5. Step 5: Solve for x
   x = 201,063,793,101.89/290,304
6. Step 6: Final answer
   x = 692,597.39