Finding the Third Proportional to 140,472 and 215,406

Step by Step Solution

1. Step 1: Write the proportion equation
   140,472 : 215,406 = 215,406 : x
2. Step 2: Convert to fraction form
   140,472/215,406 = 215,406/x
3. Step 3: Cross multiply
   140,472x = 215,406 × 215,406
4. Step 4: Simplify right side
   140,472x = 46,399,744,836
5. Step 5: Solve for x
   x = 46,399,744,836/140,472
6. Step 6: Final answer
   x = 330,313.12