Finding the Third Proportional to 267,622 and 391,384

Step by Step Solution

1. Step 1: Write the proportion equation
   267,622 : 391,384 = 391,384 : x
2. Step 2: Convert to fraction form
   267,622/391,384 = 391,384/x
3. Step 3: Cross multiply
   267,622x = 391,384 × 391,384
4. Step 4: Simplify right side
   267,622x = 153,181,435,456
5. Step 5: Solve for x
   x = 153,181,435,456/267,622
6. Step 6: Final answer
   x = 572,379.83