Finding the Third Proportional to 74,480 and 154,144

Step by Step Solution

1. Step 1: Write the proportion equation
   74,480 : 154,144 = 154,144 : x
2. Step 2: Convert to fraction form
   74,480/154,144 = 154,144/x
3. Step 3: Cross multiply
   74,480x = 154,144 × 154,144
4. Step 4: Simplify right side
   74,480x = 23,760,372,736
5. Step 5: Solve for x
   x = 23,760,372,736/74,480
6. Step 6: Final answer
   x = 319,016.82