Finding the Third Proportional to 548,908.50 and 856,561.50

Step by Step Solution

1. Step 1: Write the proportion equation
   548,908.50 : 856,561.50 = 856,561.50 : x
2. Step 2: Convert to fraction form
   548,908.50/856,561.50 = 856,561.50/x
3. Step 3: Cross multiply
   548,908.50x = 856,561.50 × 856,561.50
4. Step 4: Simplify right side
   548,908.50x = 733,697,603,282.25
5. Step 5: Solve for x
   x = 733,697,603,282.25/548,908.50
6. Step 6: Final answer
   x = 1,336,648.28