Finding the Third Proportional to 140,810 and 216,142

Step by Step Solution

1. Step 1: Write the proportion equation
   140,810 : 216,142 = 216,142 : x
2. Step 2: Convert to fraction form
   140,810/216,142 = 216,142/x
3. Step 3: Cross multiply
   140,810x = 216,142 × 216,142
4. Step 4: Simplify right side
   140,810x = 46,717,364,164
5. Step 5: Solve for x
   x = 46,717,364,164/140,810
6. Step 6: Final answer
   x = 331,775.90