Finding the Third Proportional to 40,028 and 86,680

Step by Step Solution

1. Step 1: Write the proportion equation
   40,028 : 86,680 = 86,680 : x
2. Step 2: Convert to fraction form
   40,028/86,680 = 86,680/x
3. Step 3: Cross multiply
   40,028x = 86,680 × 86,680
4. Step 4: Simplify right side
   40,028x = 7,513,422,400
5. Step 5: Solve for x
   x = 7,513,422,400/40,028
6. Step 6: Final answer
   x = 187,704.17