Finding the Third Proportional to 188,852 and 405,772

Step by Step Solution

1. Step 1: Write the proportion equation
   188,852 : 405,772 = 405,772 : x
2. Step 2: Convert to fraction form
   188,852/405,772 = 405,772/x
3. Step 3: Cross multiply
   188,852x = 405,772 × 405,772
4. Step 4: Simplify right side
   188,852x = 164,650,915,984
5. Step 5: Solve for x
   x = 164,650,915,984/188,852
6. Step 6: Final answer
   x = 871,851.59