Finding the Third Proportional to 86,469 and 188,088

Step by Step Solution

1. Step 1: Write the proportion equation
   86,469 : 188,088 = 188,088 : x
2. Step 2: Convert to fraction form
   86,469/188,088 = 188,088/x
3. Step 3: Cross multiply
   86,469x = 188,088 × 188,088
4. Step 4: Simplify right side
   86,469x = 35,377,095,744
5. Step 5: Solve for x
   x = 35,377,095,744/86,469
6. Step 6: Final answer
   x = 409,130.39