Finding the Third Proportional to 288,621.56 and 668,086.31

Step by Step Solution

1. Step 1: Write the proportion equation
   288,621.56 : 668,086.31 = 668,086.31 : x
2. Step 2: Convert to fraction form
   288,621.56/668,086.31 = 668,086.31/x
3. Step 3: Cross multiply
   288,621.56x = 668,086.31 × 668,086.31
4. Step 4: Simplify right side
   288,621.56x = 446,339,320,949.85
5. Step 5: Solve for x
   x = 446,339,320,949.85/288,621.56
6. Step 6: Final answer
   x = 1,546,451.75