Finding the Third Proportional to 59,986 and 138,871

Step by Step Solution

1. Step 1: Write the proportion equation
   59,986 : 138,871 = 138,871 : x
2. Step 2: Convert to fraction form
   59,986/138,871 = 138,871/x
3. Step 3: Cross multiply
   59,986x = 138,871 × 138,871
4. Step 4: Simplify right side
   59,986x = 19,285,154,641
5. Step 5: Solve for x
   x = 19,285,154,641/59,986
6. Step 6: Final answer
   x = 321,494.26