Finding the Third Proportional to 188,860 and 405,788

Step by Step Solution

1. Step 1: Write the proportion equation
   188,860 : 405,788 = 405,788 : x
2. Step 2: Convert to fraction form
   188,860/405,788 = 405,788/x
3. Step 3: Cross multiply
   188,860x = 405,788 × 405,788
4. Step 4: Simplify right side
   188,860x = 164,663,900,944
5. Step 5: Solve for x
   x = 164,663,900,944/188,860
6. Step 6: Final answer
   x = 871,883.41