Finding the Third Proportional to 179,019 and 389,988

Step by Step Solution

1. Step 1: Write the proportion equation
   179,019 : 389,988 = 389,988 : x
2. Step 2: Convert to fraction form
   179,019/389,988 = 389,988/x
3. Step 3: Cross multiply
   179,019x = 389,988 × 389,988
4. Step 4: Simplify right side
   179,019x = 152,090,640,144
5. Step 5: Solve for x
   x = 152,090,640,144/179,019
6. Step 6: Final answer
   x = 849,578.20