Finding the Third Proportional to 60,838 and 123,128

Step by Step Solution

1. Step 1: Write the proportion equation
   60,838 : 123,128 = 123,128 : x
2. Step 2: Convert to fraction form
   60,838/123,128 = 123,128/x
3. Step 3: Cross multiply
   60,838x = 123,128 × 123,128
4. Step 4: Simplify right side
   60,838x = 15,160,504,384
5. Step 5: Solve for x
   x = 15,160,504,384/60,838
6. Step 6: Final answer
   x = 249,194.65