Finding the Third Proportional to 123,308 and 252,442

Step by Step Solution

1. Step 1: Write the proportion equation
   123,308 : 252,442 = 252,442 : x
2. Step 2: Convert to fraction form
   123,308/252,442 = 252,442/x
3. Step 3: Cross multiply
   123,308x = 252,442 × 252,442
4. Step 4: Simplify right side
   123,308x = 63,726,963,364
5. Step 5: Solve for x
   x = 63,726,963,364/123,308
6. Step 6: Final answer
   x = 516,811.26