Finding the Third Proportional to 72,912 and 153,456

Step by Step Solution

1. Step 1: Write the proportion equation
   72,912 : 153,456 = 153,456 : x
2. Step 2: Convert to fraction form
   72,912/153,456 = 153,456/x
3. Step 3: Cross multiply
   72,912x = 153,456 × 153,456
4. Step 4: Simplify right side
   72,912x = 23,548,743,936
5. Step 5: Solve for x
   x = 23,548,743,936/72,912
6. Step 6: Final answer
   x = 322,974.87