Finding the Third Proportional to 72,400 and 153,540

Step by Step Solution

1. Step 1: Write the proportion equation
   72,400 : 153,540 = 153,540 : x
2. Step 2: Convert to fraction form
   72,400/153,540 = 153,540/x
3. Step 3: Cross multiply
   72,400x = 153,540 × 153,540
4. Step 4: Simplify right side
   72,400x = 23,574,531,600
5. Step 5: Solve for x
   x = 23,574,531,600/72,400
6. Step 6: Final answer
   x = 325,615.08