Finding the Third Proportional to 58,689 and 123,858

Step by Step Solution

1. Step 1: Write the proportion equation
   58,689 : 123,858 = 123,858 : x
2. Step 2: Convert to fraction form
   58,689/123,858 = 123,858/x
3. Step 3: Cross multiply
   58,689x = 123,858 × 123,858
4. Step 4: Simplify right side
   58,689x = 15,340,804,164
5. Step 5: Solve for x
   x = 15,340,804,164/58,689
6. Step 6: Final answer
   x = 261,391.47