Finding the Third Proportional to 258,002 and 379,418

Step by Step Solution

1. Step 1: Write the proportion equation
   258,002 : 379,418 = 379,418 : x
2. Step 2: Convert to fraction form
   258,002/379,418 = 379,418/x
3. Step 3: Cross multiply
   258,002x = 379,418 × 379,418
4. Step 4: Simplify right side
   258,002x = 143,958,018,724
5. Step 5: Solve for x
   x = 143,958,018,724/258,002
6. Step 6: Final answer
   x = 557,972.49