Finding the Third Proportional to 143,920 and 336,144

Step by Step Solution

1. Step 1: Write the proportion equation
   143,920 : 336,144 = 336,144 : x
2. Step 2: Convert to fraction form
   143,920/336,144 = 336,144/x
3. Step 3: Cross multiply
   143,920x = 336,144 × 336,144
4. Step 4: Simplify right side
   143,920x = 112,992,788,736
5. Step 5: Solve for x
   x = 112,992,788,736/143,920
6. Step 6: Final answer
   x = 785,108.32