Finding the Third Proportional to 142,700 and 221,264

Step by Step Solution

1. Step 1: Write the proportion equation
   142,700 : 221,264 = 221,264 : x
2. Step 2: Convert to fraction form
   142,700/221,264 = 221,264/x
3. Step 3: Cross multiply
   142,700x = 221,264 × 221,264
4. Step 4: Simplify right side
   142,700x = 48,957,757,696
5. Step 5: Solve for x
   x = 48,957,757,696/142,700
6. Step 6: Final answer
   x = 343,081.69