Finding the Third Proportional to 258,552 and 379,308

Step by Step Solution

1. Step 1: Write the proportion equation
   258,552 : 379,308 = 379,308 : x
2. Step 2: Convert to fraction form
   258,552/379,308 = 379,308/x
3. Step 3: Cross multiply
   258,552x = 379,308 × 379,308
4. Step 4: Simplify right side
   258,552x = 143,874,558,864
5. Step 5: Solve for x
   x = 143,874,558,864/258,552
6. Step 6: Final answer
   x = 556,462.76