Finding the Third Proportional to 64,890 and 132,996

Step by Step Solution

1. Step 1: Write the proportion equation
   64,890 : 132,996 = 132,996 : x
2. Step 2: Convert to fraction form
   64,890/132,996 = 132,996/x
3. Step 3: Cross multiply
   64,890x = 132,996 × 132,996
4. Step 4: Simplify right side
   64,890x = 17,687,936,016
5. Step 5: Solve for x
   x = 17,687,936,016/64,890
6. Step 6: Final answer
   x = 272,583.39