Finding the Third Proportional to 72,320 and 155,740

Step by Step Solution

1. Step 1: Write the proportion equation
   72,320 : 155,740 = 155,740 : x
2. Step 2: Convert to fraction form
   72,320/155,740 = 155,740/x
3. Step 3: Cross multiply
   72,320x = 155,740 × 155,740
4. Step 4: Simplify right side
   72,320x = 24,254,947,600
5. Step 5: Solve for x
   x = 24,254,947,600/72,320
6. Step 6: Final answer
   x = 335,383.68