Finding the Third Proportional to 72,640 and 153,168

Step by Step Solution

1. Step 1: Write the proportion equation
   72,640 : 153,168 = 153,168 : x
2. Step 2: Convert to fraction form
   72,640/153,168 = 153,168/x
3. Step 3: Cross multiply
   72,640x = 153,168 × 153,168
4. Step 4: Simplify right side
   72,640x = 23,460,436,224
5. Step 5: Solve for x
   x = 23,460,436,224/72,640
6. Step 6: Final answer
   x = 322,968.56