Finding the Third Proportional to 71,128 and 155,380

Step by Step Solution

1. Step 1: Write the proportion equation
   71,128 : 155,380 = 155,380 : x
2. Step 2: Convert to fraction form
   71,128/155,380 = 155,380/x
3. Step 3: Cross multiply
   71,128x = 155,380 × 155,380
4. Step 4: Simplify right side
   71,128x = 24,142,944,400
5. Step 5: Solve for x
   x = 24,142,944,400/71,128
6. Step 6: Final answer
   x = 339,429.54