Finding the Third Proportional to 71,570 and 155,830

Step by Step Solution

1. Step 1: Write the proportion equation
   71,570 : 155,830 = 155,830 : x
2. Step 2: Convert to fraction form
   71,570/155,830 = 155,830/x
3. Step 3: Cross multiply
   71,570x = 155,830 × 155,830
4. Step 4: Simplify right side
   71,570x = 24,282,988,900
5. Step 5: Solve for x
   x = 24,282,988,900/71,570
6. Step 6: Final answer
   x = 339,290.05