Finding the Third Proportional to 360,577.50 and 550,401

Step by Step Solution

1. Step 1: Write the proportion equation
   360,577.50 : 550,401 = 550,401 : x
2. Step 2: Convert to fraction form
   360,577.50/550,401 = 550,401/x
3. Step 3: Cross multiply
   360,577.50x = 550,401 × 550,401
4. Step 4: Simplify right side
   360,577.50x = 302,941,260,801
5. Step 5: Solve for x
   x = 302,941,260,801/360,577.50
6. Step 6: Final answer
   x = 840,155.75