Finding the Third Proportional to 188,146.50 and 405,087

Step by Step Solution

1. Step 1: Write the proportion equation
   188,146.50 : 405,087 = 405,087 : x
2. Step 2: Convert to fraction form
   188,146.50/405,087 = 405,087/x
3. Step 3: Cross multiply
   188,146.50x = 405,087 × 405,087
4. Step 4: Simplify right side
   188,146.50x = 164,095,477,569
5. Step 5: Solve for x
   x = 164,095,477,569/188,146.50
6. Step 6: Final answer
   x = 872,168.64