Finding the Third Proportional to 410,295 and 621,105

Step by Step Solution

1. Step 1: Write the proportion equation
   410,295 : 621,105 = 621,105 : x
2. Step 2: Convert to fraction form
   410,295/621,105 = 621,105/x
3. Step 3: Cross multiply
   410,295x = 621,105 × 621,105
4. Step 4: Simplify right side
   410,295x = 385,771,421,025
5. Step 5: Solve for x
   x = 385,771,421,025/410,295
6. Step 6: Final answer
   x = 940,229.40