Finding the Third Proportional to 72,520 and 153,740

Step by Step Solution

1. Step 1: Write the proportion equation
   72,520 : 153,740 = 153,740 : x
2. Step 2: Convert to fraction form
   72,520/153,740 = 153,740/x
3. Step 3: Cross multiply
   72,520x = 153,740 × 153,740
4. Step 4: Simplify right side
   72,520x = 23,635,987,600
5. Step 5: Solve for x
   x = 23,635,987,600/72,520
6. Step 6: Final answer
   x = 325,923.71