Finding the Third Proportional to 123,249 and 252,339

Step by Step Solution

1. Step 1: Write the proportion equation
   123,249 : 252,339 = 252,339 : x
2. Step 2: Convert to fraction form
   123,249/252,339 = 252,339/x
3. Step 3: Cross multiply
   123,249x = 252,339 × 252,339
4. Step 4: Simplify right side
   123,249x = 63,674,970,921
5. Step 5: Solve for x
   x = 63,674,970,921/123,249
6. Step 6: Final answer
   x = 516,636.82