Finding the Third Proportional to 86,622 and 188,040

Step by Step Solution

1. Step 1: Write the proportion equation
   86,622 : 188,040 = 188,040 : x
2. Step 2: Convert to fraction form
   86,622/188,040 = 188,040/x
3. Step 3: Cross multiply
   86,622x = 188,040 × 188,040
4. Step 4: Simplify right side
   86,622x = 35,359,041,600
5. Step 5: Solve for x
   x = 35,359,041,600/86,622
6. Step 6: Final answer
   x = 408,199.32