Finding the Third Proportional to 123,330 and 256,379

Step by Step Solution

1. Step 1: Write the proportion equation
   123,330 : 256,379 = 256,379 : x
2. Step 2: Convert to fraction form
   123,330/256,379 = 256,379/x
3. Step 3: Cross multiply
   123,330x = 256,379 × 256,379
4. Step 4: Simplify right side
   123,330x = 65,730,191,641
5. Step 5: Solve for x
   x = 65,730,191,641/123,330
6. Step 6: Final answer
   x = 532,961.90