Finding the Third Proportional to 288,404 and 621,182

Step by Step Solution

1. Step 1: Write the proportion equation
   288,404 : 621,182 = 621,182 : x
2. Step 2: Convert to fraction form
   288,404/621,182 = 621,182/x
3. Step 3: Cross multiply
   288,404x = 621,182 × 621,182
4. Step 4: Simplify right side
   288,404x = 385,867,077,124
5. Step 5: Solve for x
   x = 385,867,077,124/288,404
6. Step 6: Final answer
   x = 1,337,939.41