Finding the Third Proportional to 123,208 and 259,296

Step by Step Solution

1. Step 1: Write the proportion equation
   123,208 : 259,296 = 259,296 : x
2. Step 2: Convert to fraction form
   123,208/259,296 = 259,296/x
3. Step 3: Cross multiply
   123,208x = 259,296 × 259,296
4. Step 4: Simplify right side
   123,208x = 67,234,415,616
5. Step 5: Solve for x
   x = 67,234,415,616/123,208
6. Step 6: Final answer
   x = 545,698.46