Finding the Third Proportional to 39,990 and 86,034

Step by Step Solution

1. Step 1: Write the proportion equation
   39,990 : 86,034 = 86,034 : x
2. Step 2: Convert to fraction form
   39,990/86,034 = 86,034/x
3. Step 3: Cross multiply
   39,990x = 86,034 × 86,034
4. Step 4: Simplify right side
   39,990x = 7,401,849,156
5. Step 5: Solve for x
   x = 7,401,849,156/39,990
6. Step 6: Final answer
   x = 185,092.50