Finding the Third Proportional to 554,388 and 772,401

Step by Step Solution

1. Step 1: Write the proportion equation
   554,388 : 772,401 = 772,401 : x
2. Step 2: Convert to fraction form
   554,388/772,401 = 772,401/x
3. Step 3: Cross multiply
   554,388x = 772,401 × 772,401
4. Step 4: Simplify right side
   554,388x = 596,603,304,801
5. Step 5: Solve for x
   x = 596,603,304,801/554,388
6. Step 6: Final answer
   x = 1,076,147.58