Finding the Third Proportional to 212,142 and 457,494

Step by Step Solution

1. Step 1: Write the proportion equation
   212,142 : 457,494 = 457,494 : x
2. Step 2: Convert to fraction form
   212,142/457,494 = 457,494/x
3. Step 3: Cross multiply
   212,142x = 457,494 × 457,494
4. Step 4: Simplify right side
   212,142x = 209,300,760,036
5. Step 5: Solve for x
   x = 209,300,760,036/212,142
6. Step 6: Final answer
   x = 986,606.90