Finding the Third Proportional to 85,455 and 187,020

Step by Step Solution

1. Step 1: Write the proportion equation
   85,455 : 187,020 = 187,020 : x
2. Step 2: Convert to fraction form
   85,455/187,020 = 187,020/x
3. Step 3: Cross multiply
   85,455x = 187,020 × 187,020
4. Step 4: Simplify right side
   85,455x = 34,976,480,400
5. Step 5: Solve for x
   x = 34,976,480,400/85,455
6. Step 6: Final answer
   x = 409,297.06