Finding the Third Proportional to 547,401 and 820,280.50

Step by Step Solution

1. Step 1: Write the proportion equation
   547,401 : 820,280.50 = 820,280.50 : x
2. Step 2: Convert to fraction form
   547,401/820,280.50 = 820,280.50/x
3. Step 3: Cross multiply
   547,401x = 820,280.50 × 820,280.50
4. Step 4: Simplify right side
   547,401x = 672,860,098,680.25
5. Step 5: Solve for x
   x = 672,860,098,680.25/547,401
6. Step 6: Final answer
   x = 1,229,190.48