Finding the Third Proportional to 621,108 and 874,422

Step by Step Solution

1. Step 1: Write the proportion equation
   621,108 : 874,422 = 874,422 : x
2. Step 2: Convert to fraction form
   621,108/874,422 = 874,422/x
3. Step 3: Cross multiply
   621,108x = 874,422 × 874,422
4. Step 4: Simplify right side
   621,108x = 764,613,834,084
5. Step 5: Solve for x
   x = 764,613,834,084/621,108
6. Step 6: Final answer
   x = 1,231,048.12