Finding the Third Proportional to 123,489 and 265,698

Step by Step Solution

1. Step 1: Write the proportion equation
   123,489 : 265,698 = 265,698 : x
2. Step 2: Convert to fraction form
   123,489/265,698 = 265,698/x
3. Step 3: Cross multiply
   123,489x = 265,698 × 265,698
4. Step 4: Simplify right side
   123,489x = 70,595,427,204
5. Step 5: Solve for x
   x = 70,595,427,204/123,489
6. Step 6: Final answer
   x = 571,673.81