Finding the Third Proportional to 72,144 and 155,040

Step by Step Solution

1. Step 1: Write the proportion equation
   72,144 : 155,040 = 155,040 : x
2. Step 2: Convert to fraction form
   72,144/155,040 = 155,040/x
3. Step 3: Cross multiply
   72,144x = 155,040 × 155,040
4. Step 4: Simplify right side
   72,144x = 24,037,401,600
5. Step 5: Solve for x
   x = 24,037,401,600/72,144
6. Step 6: Final answer
   x = 333,186.43