Finding the Third Proportional to 142,182 and 216,345

Step by Step Solution

1. Step 1: Write the proportion equation
   142,182 : 216,345 = 216,345 : x
2. Step 2: Convert to fraction form
   142,182/216,345 = 216,345/x
3. Step 3: Cross multiply
   142,182x = 216,345 × 216,345
4. Step 4: Simplify right side
   142,182x = 46,805,159,025
5. Step 5: Solve for x
   x = 46,805,159,025/142,182
6. Step 6: Final answer
   x = 329,191.87