Finding the Third Proportional to 40,989 and 86,388

Step by Step Solution

1. Step 1: Write the proportion equation
   40,989 : 86,388 = 86,388 : x
2. Step 2: Convert to fraction form
   40,989/86,388 = 86,388/x
3. Step 3: Cross multiply
   40,989x = 86,388 × 86,388
4. Step 4: Simplify right side
   40,989x = 7,462,886,544
5. Step 5: Solve for x
   x = 7,462,886,544/40,989
6. Step 6: Final answer
   x = 182,070.47