Finding the Third Proportional to 71,128 and 153,280

Step by Step Solution

1. Step 1: Write the proportion equation
   71,128 : 153,280 = 153,280 : x
2. Step 2: Convert to fraction form
   71,128/153,280 = 153,280/x
3. Step 3: Cross multiply
   71,128x = 153,280 × 153,280
4. Step 4: Simplify right side
   71,128x = 23,494,758,400
5. Step 5: Solve for x
   x = 23,494,758,400/71,128
6. Step 6: Final answer
   x = 330,316.59