Finding the Third Proportional to 39,988 and 86,030

Step by Step Solution

1. Step 1: Write the proportion equation
   39,988 : 86,030 = 86,030 : x
2. Step 2: Convert to fraction form
   39,988/86,030 = 86,030/x
3. Step 3: Cross multiply
   39,988x = 86,030 × 86,030
4. Step 4: Simplify right side
   39,988x = 7,401,160,900
5. Step 5: Solve for x
   x = 7,401,160,900/39,988
6. Step 6: Final answer
   x = 185,084.55