Finding the Third Proportional to 72,636 and 155,640

Step by Step Solution

1. Step 1: Write the proportion equation
   72,636 : 155,640 = 155,640 : x
2. Step 2: Convert to fraction form
   72,636/155,640 = 155,640/x
3. Step 3: Cross multiply
   72,636x = 155,640 × 155,640
4. Step 4: Simplify right side
   72,636x = 24,223,809,600
5. Step 5: Solve for x
   x = 24,223,809,600/72,636
6. Step 6: Final answer
   x = 333,495.92