Finding the Third Proportional to 141,688 and 221,144

Step by Step Solution

1. Step 1: Write the proportion equation
   141,688 : 221,144 = 221,144 : x
2. Step 2: Convert to fraction form
   141,688/221,144 = 221,144/x
3. Step 3: Cross multiply
   141,688x = 221,144 × 221,144
4. Step 4: Simplify right side
   141,688x = 48,904,668,736
5. Step 5: Solve for x
   x = 48,904,668,736/141,688
6. Step 6: Final answer
   x = 345,157.45