Finding the Third Proportional to 55,988 and 86,686

Step by Step Solution

1. Step 1: Write the proportion equation
   55,988 : 86,686 = 86,686 : x
2. Step 2: Convert to fraction form
   55,988/86,686 = 86,686/x
3. Step 3: Cross multiply
   55,988x = 86,686 × 86,686
4. Step 4: Simplify right side
   55,988x = 7,514,462,596
5. Step 5: Solve for x
   x = 7,514,462,596/55,988
6. Step 6: Final answer
   x = 134,215.59