Finding the Third Proportional to 72,800 and 158,420

Step by Step Solution

1. Step 1: Write the proportion equation
   72,800 : 158,420 = 158,420 : x
2. Step 2: Convert to fraction form
   72,800/158,420 = 158,420/x
3. Step 3: Cross multiply
   72,800x = 158,420 × 158,420
4. Step 4: Simplify right side
   72,800x = 25,096,896,400
5. Step 5: Solve for x
   x = 25,096,896,400/72,800
6. Step 6: Final answer
   x = 344,737.59